spi: sh-msiof: fix controller deregistration

spi: sh-msiof: fix controller deregistration

commit 45170f67a08b912ead6ccc387ba06954d1d4e53a upstream.

Make sure to deregister the controller before releasing underlying
resources like DMA during driver unbind.

Fixes: 1bd6363bc0c6 ("spi: sh-msiof: Use core message handling instead of spi-bitbang")
Cc: stable@vger.kernel.org	# 3.15
Cc: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260410081757.503099-14-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>