refactor: make debugfs and pmf as vendor el3 services

Move Debugfs and PMF support to vendor-specific el3 space.
SMCCC 1.5 introduces vendor-specific el3 space.

Ref: https://developer.arm.com/docs/den0028/latest

Change-Id: Ie6679dbb2ca2434ebd4fc19c2cc21cf5a84f97ab
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
2 files changed