Drop CONFIG_AP_CODE_IN_CAR

This option has not been enabled on any board and was considered
obsolete last time it was touched. If we need the functionality,
let's fix this in a generic way instead of a K8 specific way.
This was mostly a speedup hack back in the day.

Change-Id: Ib1ca248c56a7f6e9d0c986c35d131d5f444de0d8
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/3211
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)

src/Kconfig

@@ -943,10 +943,6 @@ config DEBUG_COVERAGE
 endmenu
 
 # These probably belong somewhere else, but they are needed somewhere.
-config AP_CODE_IN_CAR
-	bool
-	default n
-
 config RAMINIT_SYSINFO
 	bool
 	default n