fix(realm): align realm stack

realm_entrypoint fails while accessing unaligned stack base. This
issue happens when a newly added global variable shifts the end of
stack to be unaligned.

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: I75901a2ead41adc0a19f92896be9e75b1fc882c6
1 file changed