AMD fam10: Always have AMDMCT

Also drop some more #if UNUSED_CODE.

Change-Id: I1bbe96a65c9240636ff7cfaf70c2ecbfb3aee715
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/8551
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/northbridge/amd/amdfam10/Kconfig

@@ -33,10 +33,6 @@ config AGP_APERTURE_SIZE
 	hex
 	default 0x4000000
 
-config AMDMCT
-	bool
-	default y
-
 config HW_MEM_HOLE_SIZEK
 	hex
 	default 0x100000