PCI: xilinx-nwl: Clean up clock on probe failure/removal

Make sure we turn off the clock on probe failure and device removal.

Fixes: de0a01f5 ("PCI: xilinx-nwl: Enable the clock through CCF")
Link: https://lore.kernel.org/r/20240531161337.864994-6-sean.anderson@linux.dev


Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>