cpu/intel: Rename socket_mFCPGA478 to socket_m

The name was wrong. mFCPGA478 is actually a pseudonym for mPGA478MN,
the successor of the socket that was meant.

The official name of this socket is mPGA478MT. But "Socket M" is much
easier to distinguish.

Change-Id: I4efeaca69acddfcdc5e957b0b521544314d46eeb
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/31642
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/src/cpu/intel/Makefile.inc b/src/cpu/intel/Makefile.inc
index 3ed3297..e4d3f84 100644
--- a/src/cpu/intel/Makefile.inc
+++ b/src/cpu/intel/Makefile.inc
@@ -8,7 +8,7 @@
 subdirs-$(CONFIG_CPU_INTEL_SOCKET_BGA956) += socket_BGA956
 subdirs-$(CONFIG_CPU_INTEL_SOCKET_BGA1284) += socket_BGA1284
 subdirs-$(CONFIG_CPU_INTEL_SOCKET_FCBGA559) += socket_FCBGA559
-subdirs-$(CONFIG_CPU_INTEL_SOCKET_MFCPGA478) += socket_mFCPGA478
+subdirs-$(CONFIG_CPU_INTEL_SOCKET_M) += socket_m
 subdirs-$(CONFIG_CPU_INTEL_SOCKET_MPGA478MN) += socket_mPGA478MN
 subdirs-$(CONFIG_CPU_INTEL_SOCKET_MPGA604) += socket_mPGA604
 subdirs-$(CONFIG_NORTHBRIDGE_INTEL_NEHALEM) += model_2065x