[centec] support v682-48y8c and v682-48x8c (sonic-net#9349)

Why I did it
Adding platform support for centec v682-48y8c and v682-48x8c.
V682-48y8c switch has 48 SFP+ (1G/10G/25G) ports, 8 QSFP28 (40G/100G) ports on CENTEC TsingMa.MX.
V682-48y8c is different from V682-48y8c_d in that:

transceiver is managed by cpu smbus rather than TsingMa.MX i2c bus.
port led is managed by mcu inside TsingMa.MX.
fan, psu, sensors, leds are managed by cpu smbus other than the cpu board vendor's close sourse driver.
V682-48x8c switch has 48 SFP+ (1G/10G) ports, 8 QSFP28 (40G/100G) ports on CENTEC TsingMa.MX.
CPU used in v682-48y8c and v682-48x8c is Intel(R) Xeon(R) CPU D-1527.

How I did it
Modify related code in platform and device directory.
Upgrade centec sai to v1.9.
upgrade python to python3 and kernel version to 5.0 for V682-48y8c_d.
How to verify it
Build centec amd64 sonic image, verify platform functions (port, sfp, led etc) on centec v682-48y8c and v682-48x8c board.

Co-authored-by: shil <shil@centecnetworks.com>

device/centec/x86_64-centec_v682_48x8c-r0/V682-48x8c/V682-48x8c-chip-profile.txt

@@ -0,0 +1,116 @@
+#-----------------  SDK Feature Support --------------
+[MPLS_SUPPORT]     = 1;
+[APS_SUPPORT]      = 1;
+[OAM_SUPPORT]      = 1;
+[PTP_SUPPORT]      = 0;
+[SYNCE_SUPPORT]    = 0;
+[STACKING_SUPPORT] = 1;
+[BPE_SUPPORT]      = 0;
+[IPFIX_SUPPORT]    = 1;
+[MONITOR_SUPPORT]  = 1;
+[OVERLAY_SUPPORT]  = 1;
+[EFD_SUPPORT]      = 1;
+[FCOE_SUPPORT]     = 0;
+[TRILL_SUPPORT]    = 0;
+[WLAN_SUPPORT]     = 0;
+[NPM_SUPPORT]      = 1;
+[DOT1AE_SUPPORT]   = 1;
+[SRV6_SUPPORT]     = 0;
+[DTEL_SUPPORT]     = 1;
+[FLEXE_SUPPORT]    = 0;
+[FDBTOKEN_SUPPORT]   = 1;
+
+#-----------------  Chip Init Parameter --------------
+#Local chip number and global chip id
+[Local chip_num] = 1
+[Local chip0]    = 0
+[Local chip1]    = 1
+[Port_phy_mapping] = 1
+
+#Cut through mode 0: Disable; 1:10/40/100G; 2:1/10/100G; 3:1/10/40G; other:Flex, refer to CUT_THROUGH_BITMAP
+[CUT_THROUGH_SPEED]  = 0
+#Flex cut through mode, speed enable by bitmap, refer to ctc_port_speed_t, Notice: 10M/100M/1G treat as the same speed
+[CUT_THROUGH_BITMAP]  = 0
+
+#Network cpu port
+[CPU_NETWORK_PORT_EN] = 0
+[CPU_NETWORK_PORT_ID] = 47
+
+#Enable parity error and multi-bit ecc recover
+[ECC_RECOVER_EN] = 0
+[TCAM_SCAN_EN] = 0
+[SDB_EN] = 0
+
+#-----------------  KNET Init Parameter --------------
+[KNET_EN] = 0
+
+#-----------------  FTM Init Parameter --------------
+#0: not use; 1: default; 2: layer3; 3: ipv6
+[FTM Profile] = 0
+
+#-----------------  Interrupt Init Parameter --------------
+#0: pin, 1: msi
+[Interrupt_mode] = 1
+
+#-----------------  NextHop Init Parameter --------------
+#0: SDK work in pizzbox (single chip system), 1: SDK work in multi-chip system
+[Nexthop Edit Mode]       = 0
+[External Nexthop Number] = 16384
+[MPLS Tunnel Number]      = 1024
+[H_ECMP_EN]               = 0
+
+#-----------------  L2 Init Parameter --------------
+[FDB Hw Learning] = 0
+[Logic Port Num] = 1024
+#0: 128 instance per port, 1: 64 instance per port, 2: 32 instance per port
+[STP MODE] = 0
+[MAX_FID_NUM] = 5120
+
+#-----------------  Stats Init Parameter --------------
+[STATS_QUEUE_DEQ_EN]    = 1
+[STATS_QUEUE_DROP_EN]   = 1
+[STATS_FLOW_POLICER_EN] = 1
+[STATS_VLAN_EN]         = 0
+[STATS_VRF_EN]          = 0
+[STATS_POLICER_NUM]     = 1024
+[STATS_PORT_EN]         = 0
+[STATS_ECMP_EN]         = 0
+
+#-----------------  BPE Init Parameter --------------
+[BPE_BR_PORT_EXTENDER_EN]  = 0
+[BPE_BR_UC_MAX_ECID]       = 1024
+[BPE_BR_MC_MAX_ECID]       = 4096
+[BPE_BR_PORT_BASE]         = 0
+
+#-----------------  Ipuc Init Parameter --------------
+#0: tcam use prefix 16; 1: tcam use prefix 8
+[IPUC_TCAM_PREFIX_8] = 1
+
+#-----------------  QoS Init Parameter --------------
+#QoS policer number support 1K/2K/4K/8K, default 4K
+[QOS_POLICER_NUM] = 4096
+#qos queue mode 0: 8(basic)+1(cpu)
+#qos queue mode  1: 8(basic)+1(span)+1(mcast)
+[QOS_QUEUE_MODE] = 0
+#QoS port extend queue number support 0/4, default 0
+[QOS_PORT_EXT_QUEUE_NUM] = 0
+#QoS CPU reason queue number support 128/64/32, default 128
+[QOS_CPU_QUEUE_NUM] = 128
+[QOS_INGRESS_VLAN_POLICER_NUM] = 0
+[QOS_EGRESS_VLAN_POLICER_NUM] = 0
+#QoS the max number of igs/egs reserve macro policer,which ACL entry support micro and macro at the same time
+[QOS_INGRESS_MACRO_POLICER_NUM] = 0
+[QOS_EGRESS_MACRO_POLICER_NUM] = 0
+#QOS service queue mode, default 0,0:logic scr port + dstport enq 1:service id + dstport enq
+[QOS_SERVICE_QUEUE_MODE] = 0
+#mode 0:svc policer used for service policer
+#mode 1:svc policer used for stormctl
+[QOS_POLICER_SVC_MODE] = 0
+
+#-----------------  Stacking Init Parameter --------------
+#0: normal mode; 1: spine-leaf mode
+[FABRIC MODE] = 0
+[STACKING VERSION] = 1
+#-----------------  LB hash Init Parameter --------------
+#0: support 4 select num; 1: support 8 select num; only TM2 support mode 1
+[LB_HASH_MODE] = 0