MMCONF_SUPPORT: Flip default to enabled

Also remove separate MMCONF_SUPPORT_DEFAULT flag.

Change-Id: Idf1accdb93843a8fe2ee9c09fb984968652476e0
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/17694
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/baytrail/Kconfig

@@ -18,7 +18,6 @@ config CPU_SPECIFIC_OPTIONS
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	select HAVE_SMI_HANDLER
 	select HAVE_HARD_RESET
-	select MMCONF_SUPPORT_DEFAULT
 	select NO_FIXED_XIP_ROM_SIZE
 	select RELOCATABLE_MODULES
 	select RELOCATABLE_RAMSTAGE