doc: Update list of supported FVP platforms
doc: Update list of supported FVP platforms

Updated the list of supported FVP platform as per latest
FVP platform release.

Signed-off-by: Manish V Badarkhe <d2342ad575f6bc1a5f5a5b89d6db0f72dd7e0e4c@arm.com>
Change-Id: I45ef79aff147ed598a3a92ab6f6b277f7f70604a

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware