Marvell updates for SONiC 201709.

device/accton/x86_64-accton_as7212_54x-r0/AS7212-54x/port_config.ini

@@ -0,0 +1,55 @@
+# name          lanes
+Ethernet0       0
+Ethernet1       1
+Ethernet2       2
+Ethernet3       3
+Ethernet4       4
+Ethernet5       5
+Ethernet6       6
+Ethernet7       7
+Ethernet8       8
+Ethernet9       9
+Ethernet10      10
+Ethernet11      11
+Ethernet12      12
+Ethernet13      13
+Ethernet14      14
+Ethernet15      15
+Ethernet16      16
+Ethernet17      17
+Ethernet18      18
+Ethernet19      19
+Ethernet20      20
+Ethernet21      21
+Ethernet22      22
+Ethernet23      23
+Ethernet24      24
+Ethernet25      25
+Ethernet26      26
+Ethernet27      27
+Ethernet28      28
+Ethernet29      29
+Ethernet30      30
+Ethernet31      31
+Ethernet32      32
+Ethernet33      33
+Ethernet34      34
+Ethernet35      35
+Ethernet36      36
+Ethernet37      37
+Ethernet38      38
+Ethernet39      39
+Ethernet40      40
+Ethernet41      41
+Ethernet42      42
+Ethernet43      43
+Ethernet44      44
+Ethernet45      45
+Ethernet46      46
+Ethernet47      47
+Ethernet48      48
+Ethernet49      49
+Ethernet50      50
+Ethernet51      51
+Ethernet52      52
+Ethernet53      53

device/accton/x86_64-accton_as7212_54x-r0/AS7212-54x/sai.profile

@@ -0,0 +1,2 @@
+mode=1
+hwId=as7212-54x

device/accton/x86_64-accton_as7212_54x-r0/installer.conf

@@ -0,0 +1,3 @@
+CONSOLE_PORT=0x2f8
+CONSOLE_DEV=1
+CONSOLE_SPEED=115200