pinctrl: sunxi: do not print error message for EPROBE_DEFER

Avoid printing an error message if getting a regulator fails with
EPROBE_DEFER.  This can happen if, for example, a regulator supplying
one of the main banks is controlled by a PL pin.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20220217131737.10931-1-mans@mansr.com


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