UefiCpuPkg/CpuDxe: Fix boot error

UefiCpuPkg/CpuDxe: Fix boot error

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084

When DXE drivers are dispatched above 4GB memory in 64bit
mode, the address setCodeSelectorLongJump in stack will
be override by parameter. Jump to Qword is not supported
by some processors. So use "o64 retf" instead.

Signed-off-by: Guo Dong <guo.dong@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Tested-by: James Bottomley <jejb@linux.ibm.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>