FmpDevicePkg/FmpDxe: Add PcdFmpDeviceStorageAccessEnable

FmpDevicePkg/FmpDxe: Add PcdFmpDeviceStorageAccessEnable

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1525

Add PCD PcdFmpDeviceStorageAccessEnable.  If this PCD is
TRUE, then the Firmware Management Protocol supports access
to the firmware storage device.  This is the default setting.
If FALSE, then Firmware Management Protocol services that
access the firmware storage device return EFI_UNSUPPORTED
except GetImageInfo().  Setting this value to FALSE produces
the smallest possible FmpDxe driver that still advertises the
updatable firmware component in the ESRT.

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Eric Jin <eric.jin@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>