chore: rename hunter_elp to cortex-x4

Rename hunter_elp to cortex-x4

Change-Id: I78c8c009d7bee14b4793dc1d950ed81273216831
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
(cherry picked from commit 870fcb949514295725c5b22c2b58ba2e7e9cbcd8)
6 files changed