nehalem/Kconfig: Rename TRAINING_CACHE_SIZE to MRC_CACHE_SIZE

This is more consistent with newer Intel targets.

Change-Id: I52ee8d3f0c330a03bd6c18eed08e578dd6ae284b
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/18371
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

src/northbridge/intel/nehalem/Kconfig

@@ -49,7 +49,7 @@ config BOOTBLOCK_NORTHBRIDGE_INIT
 	string
 	default "northbridge/intel/nehalem/bootblock.c"
 
-config TRAINING_CACHE_SIZE
+config MRC_CACHE_SIZE
 	hex
 	default 0x10000
 

src/northbridge/intel/nehalem/Makefile.inc

@@ -31,7 +31,7 @@ smm-$(CONFIG_HAVE_SMI_HANDLER) += finalize.c
 
 $(obj)/mrc.cache:
 	dd if=/dev/zero count=1 \
-	bs=$(shell printf "%d" $(CONFIG_TRAINING_CACHE_SIZE) ) | \
+	bs=$(shell printf "%d" $(CONFIG_MRC_CACHE_SIZE) ) | \
 	tr '\000' '\377' > $@
 
 cbfs-files-y += mrc.cache