input: sensors: correct the reset procedure of akm09911

The reset pin of akm09911 should be set low & high in order to reset
it. It's still needed to call GPIOLIB to assign a gpio's value when
pinctrl is enabled.

Change-Id: Iadb38a5809ef7f0ede77b35596afd25d2189ffca
Signed-off-by: Oliver Wang <mengmeng@codeaurora.org>