pinctrl: fixup for "i2c: Make remove callback return void"

Fix up the build.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/r/20220826152650.2c55e482@canb.auug.org.au


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>