arm/configs/multi_v5: Add Aspeed ast2400

This adds the Aspeed ast2400 BMC SoC to the build.

The SoC has six UARTs so we need to enable the appropriate options for
SERIAL_8250
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/configs/multi_v5_defconfig

@@ -12,6 +12,8 @@ CONFIG_MODULE_UNLOAD=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_MVEBU=y
 CONFIG_MACH_KIRKWOOD=y
+CONFIG_ARCH_ASPEED=y
+CONFIG_MACH_ASPEED_G4=y
 CONFIG_ARCH_MXC=y
 CONFIG_MACH_IMX27_DT=y
 CONFIG_SOC_IMX25=y
@@ -108,7 +110,10 @@ CONFIG_LEGACY_PTY_COUNT=16
 # CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
-CONFIG_SERIAL_8250_RUNTIME_UARTS=2
+CONFIG_SERIAL_8250_NR_UARTS=6
+CONFIG_SERIAL_8250_RUNTIME_UARTS=6
+CONFIG_SERIAL_8250_EXTENDED=y
+CONFIG_SERIAL_8250_MANY_PORTS=y
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_HW_RANDOM is not set
 CONFIG_I2C=y
@@ -129,7 +134,6 @@ CONFIG_SENSORS_LM75=y
 CONFIG_SENSORS_LM85=y
 CONFIG_THERMAL=y
 CONFIG_KIRKWOOD_THERMAL=y
-CONFIG_WATCHDOG=y
 CONFIG_ORION_WATCHDOG=y
 # CONFIG_ABX500_CORE is not set
 CONFIG_REGULATOR=y