cpu/intel/haswell: remove dependency on socket_rpga989

Remove dependency of Haswell on cpu/intel/socket_rpga989 code,
which is a carry-over from Sandy Bridge/Ivy Bridge and older
coreboot conventions where features were structured around socket types.

Add CPU-specific options to Kconfig and required subdirs to
Makefile.inc which are curently included with socket_rpga989.

TEST=successfully built and booted on google/panther

Change-Id: Ic788e2928df107d11ea2d2eca7613490aaed395c
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: http://review.coreboot.org/10037
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/mainboard/intel/baskingridge/Kconfig b/src/mainboard/intel/baskingridge/Kconfig
index 485ff75..b636e5b 100644
--- a/src/mainboard/intel/baskingridge/Kconfig
+++ b/src/mainboard/intel/baskingridge/Kconfig
@@ -2,7 +2,7 @@
 
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y
-	select CPU_INTEL_SOCKET_RPGA989
+	select CPU_INTEL_HASWELL
 	select NORTHBRIDGE_INTEL_HASWELL
 	select SOUTHBRIDGE_INTEL_LYNXPOINT
 	select BOARD_ROMSIZE_KB_8192