Move select MMCONF_SUPPORT under northbridge (fix)

I missed the board with gm45 when I moved MMCONF_SUPPORT lines.

Also, the intel/i3100 does not have MMCONF_SUPPORT implemented
even though it was previously selected for intel/eagleheights board.

Change-Id: I9c7f6b0a150b4d54288a1e015277b9d98467fca4
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3598
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/mainboard/roda/rk9/Kconfig

@@ -7,7 +7,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select NORTHBRIDGE_INTEL_GM45
 	select SOUTHBRIDGE_INTEL_I82801IX
 	select SUPERIO_SMSC_LPC47N227
-	select MMCONF_SUPPORT
 	select BOARD_ROMSIZE_KB_4096
 	select RTL8168_ROM_DISABLE
 	select DRIVERS_GENERIC_IOAPIC

src/northbridge/intel/gm45/Kconfig

@@ -25,6 +25,7 @@ if NORTHBRIDGE_INTEL_GM45
 config NORTHBRIDGE_SPECIFIC_OPTIONS # dummy
 	def_bool y
 	select HAVE_DEBUG_RAM_SETUP
+	select MMCONF_SUPPORT
 	select MMCONF_SUPPORT_DEFAULT
 	select IOMMU
 

src/northbridge/intel/i3100/Kconfig

@@ -1,6 +1,5 @@
 config NORTHBRIDGE_INTEL_I3100
 	bool
-	select MMCONF_SUPPORT
 
 if NORTHBRIDGE_INTEL_I3100
 config DIMM_MAP_LOGICAL