refactor: rename FFA_MSG_RUN to FFA_RUN

The correct ABI function name is FFA_RUN per FF-A v1.1 EAC0
specification. Update it in the relevant FF-A helpers.

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I82858c6a6080b946f4882f8d85a30795d8e60e58
3 files changed