build: update TF-RMM release version to v0.7.0

Bump up the TF-RMM version to 0.7.0. This has been tested with
TF-A v2.13 release.

Change-Id: I4f6e481a1b013d682ee5c87b8a4f9d37e5e65602
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
1 file changed