fix: OP-TEE SP manifest per latest SPMC changes
fix: OP-TEE SP manifest per latest SPMC changes

Update UUID to little endian:
The SPMC expects a little endian representation of the UUID as an array
of four integers in the SP manifest.

Add managed exit field and cosmetic comments updates.

Signed-off-by: Olivier Deprez <a71d93c73db536dc855a04902dabc350f140693d@arm.com>
Change-Id: Icad93ca70bc27bc9d83b8cf888fe5f8839cb1288

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