bcm4908: set console in the CONFIG_CMDLINE

procd doesn't work with just serial specified in the DT (using chosen &
stdout-path). It requires tty device to be explicitly specified in the
cmdline.

Signed-off-by: Rafał Miłecki <[email protected]>

target/linux/bcm4908/config-5.4

@@ -48,7 +48,7 @@ CONFIG_BLK_PM=y
 CONFIG_CAVIUM_TX2_ERRATUM_219=y
 CONFIG_CLKDEV_LOOKUP=y
 CONFIG_CLONE_BACKWARDS=y
-CONFIG_CMDLINE="earlycon=bcm63xx_uart,0xff800640"
+CONFIG_CMDLINE="earlycon=bcm63xx_uart,0xff800640 console=ttyS0,115200"
 CONFIG_CMDLINE_FORCE=y
 CONFIG_COMMON_CLK=y
 CONFIG_CPU_RMAP=y