fwu: enhance GPT generation to include metadata and copies of FIP

Enhanced the GPT image creation script to incorporate FWU
metadata and support multiple copies of FIP images.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I3a770c4ca44b44cff56fdcf3e6201462293dbfb1
1 file changed