fix(plat/tc0): enable AMU extension

Recent changes to enable SVE for the secure world have disabled AMU
extension by default in the reset value of CPTR_EL3 register. So the
platform has to enable this extension explicitly.

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: I7d930d96ec22d7c3db961411370564bece0ce272
1 file changed