spi: cavium-thunderx: fix controller deregistration

spi: cavium-thunderx: fix controller deregistration

commit dbb6b01267c0c866eaac4019cec19f414beec61d upstream.

Make sure to deregister the controller before disabling it to avoid
hanging or leaking resources associated with the queue when the queue
non-empty.

Fixes: 7347a6c7af8d ("spi: octeon: Add ThunderX driver")
Cc: stable@vger.kernel.org	# 4.9
Cc: Jan Glauber <jan.glauber@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260409120419.388546-10-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>