x86_64: Turn on 64-bit core registers initialization.

This enables 64-bit core registers initialization for x86_64.
The backend update with 64-bit temp support is in progress.

Change-Id: If7c9a62c1145f81050adda86f2beed427220baa2
Signed-off-by: Chao-ying Fu <chao-ying.fu@intel.com>
Signed-off-by: Dmitry Petrochenko <dmitry.petrochenko@intel.com>
Signed-off-by: Serguei Katkov <serguei.i.katkov@intel.com>
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>
1 file changed