Fix X86_64 assembler REX instructions

A couple of instructions don't pass the 'Address' to EmitRex64.  This
will cause the incorrect register number to be assembled if the register
is >= 8.

This may cause bad code to be generated in some cases.

Change-Id: I2907ae8b7629ee95d542e3fab429318994a78938
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>
2 files changed