The value returned by an spi driver's remove function is mostly ignored.
(Only an error message is printed if the value is non-zero that the
error is ignored.)

So change the prototype of the remove function to return no value. This
way driver authors are not tempted to assume that passing an error to
the upper layer is a good idea. All drivers are adapted accordingly.
There is no intended change of behaviour, all callbacks were prepared to
return 0 before.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Acked-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: NJérôme Pouiller <jerome.pouiller@silabs.com>
Acked-by: NMiquel Raynal <miquel.raynal@bootlin.com>
Acked-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: NClaudius Heine <ch@denx.de>
Acked-by: NStefan Schmidt <stefan@datenfreihafen.org>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # For MMC
Acked-by: NMarcus Folkesson <marcus.folkesson@gmail.com>
Acked-by: NŁukasz Stelmach <l.stelmach@samsung.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220123175201.34839-6-u.kleine-koenig@pengutronix.deSigned-off-by: NMark Brown <broonie@kernel.org>