rse: Pass the flash device to fip_get_entry_by_uuid

Some platforms store the FIP in a different flash device, add
an extra argument to fip_get_entry_by_uuid to be able to parse
the FIP from any flash device.

Change-Id: Ide1729c18ff608367ee13b1f4be1d12bb5da551f
Signed-off-by: Ziad Elhanafy <ziad.elhanafy@arm.com>