siox: Simplify error handling via dev_err_probe()

commit a787e540 ("driver core: add device probe log helper")
introduced a helper for a common error checking pattern.  Use it.

Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thorsten Scherer <t.scherer@eckelmann.de>
Link: https://lore.kernel.org/r/20210616061736.3786173-2-t.scherer@eckelmann.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>