spi: octeon: fix controller deregistration

spi: octeon: fix controller deregistration

commit 3c49a4d8799bee423a80f392ba95b26af8e9ab91 upstream.

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

Fixes: 22ad2d8df77d ("spi: octeon: use devm_spi_register_master()")
Cc: stable@vger.kernel.org	# 3.13
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260409120419.388546-9-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>