Move cpus_ready_for_init() to AMD K8

The function is a noop for all but amd/serengeti_cheetah.

Change-Id: I09e2e710aa964c2f31e35fcea4f14856cc1e1dca
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/1184
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

src/cpu/x86/Kconfig

@@ -2,10 +2,6 @@ config SERIAL_CPU_INIT
 	bool
 	default y
 
-config WAIT_BEFORE_CPUS_INIT
-	bool
-	default n
-
 config UDELAY_IO
 	bool
 	default y if !UDELAY_LAPIC && !UDELAY_TSC

src/cpu/x86/lapic/lapic_cpu_init.c

@@ -502,8 +502,6 @@ void initialize_cpus(struct bus *cpu_bus)
 	smm_init();
 #endif
 
-	cpus_ready_for_init();
-
 #if CONFIG_SMP
 	#if !CONFIG_SERIAL_CPU_INIT
 	/* start all aps at first, so we can init ECC all together */