Memtest86+: Fix bit field that was getting masked off

cpu_id.vers.bits.extendedModel is a 4-bit bitfield.  By shifting it
right 4 bits, we were always setting it to 0, making this test
always fail.

Change-Id: Id3963ade51617637a589a00546810e8eadff0353
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14178
Tested-by: build bot (Jenkins)
Reviewed-by: Ben Gardner <gardner.ben@gmail.com>
1 file changed