Add build rules and whatnot for ThinFat32 driver.

Signed-off-by: Peter Jones <pjones@redhat.com>
Add ThinFat32.c, which is not yet ready to actually build in this tree.

Signed-off-by: Peter Jones <pjones@redhat.com>
Rename FatPeimEntryPoint to FatPeimEntry to match other Peim drivers.

Signed-off-by: Peter Jones <pjones@redhat.com>
Very beginnings of this...

Signed-off-by: Peter Jones <pjones@redhat.com>