MdeModulePkg/BootScriptExecuteorDxe: check 64BIT_WAKE_F in FACS.OSPMFlags

MdeModulePkg/BootScriptExecuteorDxe: check 64BIT_WAKE_F in FACS.OSPMFlags

((Facs->Flags & EFI_ACPI_4_0_OSPM_64BIT_WAKE__F) != 0))

In above code, Facs->OspmFlags should be used instead.
EFI_ACPI_4_0_OSPM_64BIT_WAKE__F is a bit in OSPM Enabled Firmware
Control Structure Flags field, not in Firmware Control Structure
Feature Flags.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1430

Cc: Aleksiy <oleksiyy@ami.com>
Cc: Jian Wang <jian.j.wang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>