Set MMX and SSE where needed. Note that many boards don't even bother 
with this as many boards (AMD in particular) use CAR.

This list determined by a series of greps etc. on mainboards, no humans
were harmed in the making of this list. 

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Index: src/cpu/intel/socket_mPGA604/Kconfig
===================================================================
--- src/cpu/intel/socket_mPGA604/Kconfig	(revision 4744)
+++ src/cpu/intel/socket_mPGA604/Kconfig	(working copy)
@@ -4,3 +4,5 @@
 	select CPU_INTEL_MODEL_F2X
 	select CPU_INTEL_MODEL_F3X
 	select CPU_INTEL_MODEL_F4X
+	select MMX
+	select SSE
Index: src/cpu/intel/socket_PGA370/Kconfig
===================================================================
--- src/cpu/intel/socket_PGA370/Kconfig	(revision 4744)
+++ src/cpu/intel/socket_PGA370/Kconfig	(working copy)
@@ -21,3 +21,4 @@
 config CPU_INTEL_SOCKET_PGA370
 	bool
 	default n
+	select MMX
Index: src/cpu/intel/socket_mPGA479M/Kconfig
===================================================================
--- src/cpu/intel/socket_mPGA479M/Kconfig	(revision 4744)
+++ src/cpu/intel/socket_mPGA479M/Kconfig	(working copy)
@@ -3,3 +3,5 @@
 	default n
 	select CPU_INTEL_MODEL_69X
 	select CPU_INTEL_MODEL_6DX
+	select MMX
+	select SSE