linux-imx

regulator: arizona-micsupp: Delete unused include

This driver uses no symbols from <linux/gpio.h> so just drop
this include.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>