reset: zynqmp: allow building under COMPILE_TEST

The ZynqMP reset driver can be compiled without ARCH_ZYNQMP being
enabled. Allow it to be built under COMPILE_TEST.

Acked-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20240621-reset-compile-zynqmp-v1-1-ede43ab18101@pengutronix.de


Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>