UefiCpuPkg/MpInitLib: Force to enable X2APIC if CPU number > 255

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
(cherry picked from commit 71d8226ac6f256d360626c8072337f9373f95671)
1 file changed