spi: mpc52xx: fix controller deregistration

spi: mpc52xx: fix controller deregistration

Make sure to deregister the controller before disabling and releasing
underlying resources like interrupts and gpios during driver unbind.

Fixes: 42bbb70980f3 ("powerpc/5200: Add mpc5200-spi (non-PSC) device driver")
Fixes: b8d4e2ce60b6 ("mpc52xx_spi: add gpio chipselect")
Cc: stable@vger.kernel.org	# 2.6.33
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Luotao Fu <l.fu@pengutronix.de>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260414134319.978196-4-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>