cpu/intel: Add socket BGA1284

Add an additional Sandy(Ivy)bridge processor socket.

Change-Id: I7eff7183d0c003e61fdda5350579f4d3dec7504d
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/12168
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: York Yang <york.yang@intel.com>

src/cpu/intel/Kconfig

@@ -25,6 +25,7 @@ source src/cpu/intel/haswell/Kconfig
 source src/cpu/intel/slot_2/Kconfig
 source src/cpu/intel/slot_1/Kconfig
 source src/cpu/intel/socket_BGA956/Kconfig
+source src/cpu/intel/socket_BGA1284/Kconfig
 source src/cpu/intel/socket_FC_PGA370/Kconfig
 source src/cpu/intel/socket_mFCBGA479/Kconfig
 source src/cpu/intel/socket_mFCPGA478/Kconfig