Drop redundant select CACHE_AS_RAM

The few remaining boards without CAR override this with
select ROMCC.

Change-Id: Ifd5223e67f6a2dadb47846bdaab40b1be763cf69
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/6172
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

src/cpu/via/c7/Kconfig

@@ -11,7 +11,6 @@ config CPU_SPECIFIC_OPTIONS
 	select UDELAY_TSC
 	select MMX
 	select SSE2
-	select CACHE_AS_RAM
 
 config DCACHE_RAM_BASE
 	hex

src/cpu/via/nano/Kconfig

@@ -30,7 +30,6 @@ config CPU_SPECIFIC_OPTIONS
 	select UDELAY_TSC
 	select MMX
 	select SSE2
-	select CACHE_AS_RAM
 	select SUPPORT_CPU_UCODE_IN_CBFS
 
 config DCACHE_RAM_BASE