feat: add USB serial support

This change adds support for the following common USB (at least in my
home) serial converters:
- CH341
- CP210x
- FDTI SIO
- PL2303

Signed-off-by: Jorik Jonker <jorik.jonker@eu.equinix.com>

kernel/kernel/config-amd64

@@ -4125,7 +4125,60 @@ CONFIG_USB_STORAGE=y
 #
 # USB port drivers
 #
-# CONFIG_USB_SERIAL is not set
+CONFIG_USB_SERIAL=y
+# CONFIG_USB_SERIAL_CONSOLE is not set
+# CONFIG_USB_SERIAL_GENERIC is not set
+# CONFIG_USB_SERIAL_SIMPLE is not set
+# CONFIG_USB_SERIAL_AIRCABLE is not set
+# CONFIG_USB_SERIAL_ARK3116 is not set
+# CONFIG_USB_SERIAL_BELKIN is not set
+CONFIG_USB_SERIAL_CH341=y
+# CONFIG_USB_SERIAL_WHITEHEAT is not set
+# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
+CONFIG_USB_SERIAL_CP210X=y
+# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
+# CONFIG_USB_SERIAL_EMPEG is not set
+CONFIG_USB_SERIAL_FTDI_SIO=y
+# CONFIG_USB_SERIAL_VISOR is not set
+# CONFIG_USB_SERIAL_IPAQ is not set
+# CONFIG_USB_SERIAL_IR is not set
+# CONFIG_USB_SERIAL_EDGEPORT is not set
+# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
+# CONFIG_USB_SERIAL_F81232 is not set
+# CONFIG_USB_SERIAL_F8153X is not set
+# CONFIG_USB_SERIAL_GARMIN is not set
+# CONFIG_USB_SERIAL_IPW is not set
+# CONFIG_USB_SERIAL_IUU is not set
+# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
+# CONFIG_USB_SERIAL_KEYSPAN is not set
+# CONFIG_USB_SERIAL_KLSI is not set
+# CONFIG_USB_SERIAL_KOBIL_SCT is not set
+# CONFIG_USB_SERIAL_MCT_U232 is not set
+# CONFIG_USB_SERIAL_METRO is not set
+# CONFIG_USB_SERIAL_MOS7720 is not set
+# CONFIG_USB_SERIAL_MOS7840 is not set
+# CONFIG_USB_SERIAL_MXUPORT is not set
+# CONFIG_USB_SERIAL_NAVMAN is not set
+CONFIG_USB_SERIAL_PL2303=y
+# CONFIG_USB_SERIAL_OTI6858 is not set
+# CONFIG_USB_SERIAL_QCAUX is not set
+# CONFIG_USB_SERIAL_QUALCOMM is not set
+# CONFIG_USB_SERIAL_SPCP8X5 is not set
+# CONFIG_USB_SERIAL_SAFE is not set
+# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
+# CONFIG_USB_SERIAL_SYMBOL is not set
+# CONFIG_USB_SERIAL_TI is not set
+# CONFIG_USB_SERIAL_CYBERJACK is not set
+# CONFIG_USB_SERIAL_XIRCOM is not set
+# CONFIG_USB_SERIAL_OPTION is not set
+# CONFIG_USB_SERIAL_OMNINET is not set
+# CONFIG_USB_SERIAL_OPTICON is not set
+# CONFIG_USB_SERIAL_XSENS_MT is not set
+# CONFIG_USB_SERIAL_WISHBONE is not set
+# CONFIG_USB_SERIAL_SSU100 is not set
+# CONFIG_USB_SERIAL_QT2 is not set
+# CONFIG_USB_SERIAL_UPD78F0730 is not set
+# CONFIG_USB_SERIAL_DEBUG is not set
 
 #
 # USB Miscellaneous drivers

kernel/kernel/config-arm64

@@ -5438,13 +5438,13 @@ CONFIG_USB_SERIAL=y
 # CONFIG_USB_SERIAL_AIRCABLE is not set
 # CONFIG_USB_SERIAL_ARK3116 is not set
 # CONFIG_USB_SERIAL_BELKIN is not set
-# CONFIG_USB_SERIAL_CH341 is not set
+CONFIG_USB_SERIAL_CH341=y
 # CONFIG_USB_SERIAL_WHITEHEAT is not set
 # CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
-# CONFIG_USB_SERIAL_CP210X is not set
+CONFIG_USB_SERIAL_CP210X=y
 # CONFIG_USB_SERIAL_CYPRESS_M8 is not set
 # CONFIG_USB_SERIAL_EMPEG is not set
-# CONFIG_USB_SERIAL_FTDI_SIO is not set
+CONFIG_USB_SERIAL_FTDI_SIO=y
 # CONFIG_USB_SERIAL_VISOR is not set
 # CONFIG_USB_SERIAL_IPAQ is not set
 # CONFIG_USB_SERIAL_IR is not set
@@ -5465,7 +5465,7 @@ CONFIG_USB_SERIAL=y
 # CONFIG_USB_SERIAL_MOS7840 is not set
 # CONFIG_USB_SERIAL_MXUPORT is not set
 # CONFIG_USB_SERIAL_NAVMAN is not set
-# CONFIG_USB_SERIAL_PL2303 is not set
+CONFIG_USB_SERIAL_PL2303=y
 # CONFIG_USB_SERIAL_OTI6858 is not set
 # CONFIG_USB_SERIAL_QCAUX is not set
 # CONFIG_USB_SERIAL_QUALCOMM is not set