Set MMX and SSE where needed. Note that many boards don't even bother

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>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4745 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1