remove CONFIG_SERIAL_CPU_INIT

The new broadcast code doesn't support serial init - if a CPU
needs serial init, this should be handled in the model specific CPU
init code.

Change-Id: I7cafb0af10d712366819ad0849f9b93558e9d46a
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/1140
Tested-by: build bot (Jenkins)

src/cpu/intel/model_206ax/Kconfig

@@ -17,10 +17,6 @@ config BOOTBLOCK_CPU_INIT
 	string
 	default "cpu/intel/model_206ax/bootblock.c"
 
-config SERIAL_CPU_INIT
-	bool
-	default n
-
 config SMM_TSEG_SIZE
 	hex
 	default 0x800000

src/cpu/x86/Kconfig

@@ -1,7 +1,3 @@
-config SERIAL_CPU_INIT
-	bool
-	default y
-
 config WAIT_BEFORE_CPUS_INIT
 	bool
 	default n