Intel cpus: apply un-written naming rules

Kconfig directives to select chip drivers for compile literally
match the chip directory names capitalized and underscored.

Note: CPU_INTEL_CORE2 was used on both model_6fx and model_1067x.

Change-Id: I8fa5ba71b14dcce79ab2a2c1c69b3bc36edbdea0
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/618
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/cpu/intel/Makefile.inc b/src/cpu/intel/Makefile.inc
index 274c101..05f947d 100644
--- a/src/cpu/intel/Makefile.inc
+++ b/src/cpu/intel/Makefile.inc
@@ -4,7 +4,7 @@
 # Therefore: ONLY include Makefile.inc from socket directories!
 
 subdirs-$(CONFIG_CPU_INTEL_SOCKET_441) += socket_441
-subdirs-$(CONFIG_CPU_INTEL_SOCKET_BGA956) += bga956
+subdirs-$(CONFIG_CPU_INTEL_SOCKET_BGA956) += socket_BGA956
 subdirs-$(CONFIG_CPU_INTEL_EP80579) += ep80579
 subdirs-$(CONFIG_CPU_INTEL_SOCKET_FC_PGA370) += socket_FC_PGA370
 subdirs-$(CONFIG_CPU_INTEL_SOCKET_MFCBGA479) += socket_mFCBGA479