fix(gpt): declare gpt_tlbi_by_pa_ll()

The patch 8754cc5 accidentally removes the declaration of
gpt_tlbi_by_pa_ll() and hence breaks RME builds. This patch
fixes the same.

signed-off-by: Soby Mathew <soby.mathew@arm.com>
Change-Id: I2523982fc48bca2a1f1a36fd9bd3803b01c6916a
1 file changed