perf/smmuv3: Remove build dependency on ACPI

This driver supports working without ACPI since commit 3f7be435


("perf/smmuv3: Add devicetree support"), so remove the build dependency.

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20230706-smmuv3-pmu-noacpi-v1-1-7083ef189158@axis.com
Signed-off-by: Will Deacon <will@kernel.org>