staging:iio:magnetometer:ak8975: use gpio_request_one api

Use gpio_request_one api, it looks cleaner.

Signed-off-by: Leed Aguilar <leed.aguilar@ti.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/iio/magnetometer/Kconfig
Simple merge

diff --cc drivers/staging/iio/magnetometer/ak8975.c
Simple merge