fix: use PRIx64 print format instead of llx

sha 4ce3e99a3 in tf-a repository broke the build because of incorrect
format specifier, Fix to use correct print format.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: Ib46e5ebfc67f6f79c14c456a3e57def7da423074
1 file changed