Convert the dynamic patching for ARM64_HAS_SYSREG_GIC_CPUIF over to
the newly added alternative assembler macros.
Acked-by: NMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: NDaniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>