mfd: Include <linux/gpio.h> instead of <asm/gpio.h>

As warned by checkpatch.pl, use #include <linux/gpio.h> instead
of <asm/gpio.h>.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
1 file changed