gpio: include <linux/gpio.h> not <asm/gpio.h>

Drivers should be including <linux/gpio.h> not <asm/gpio.h>.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc drivers/gpio/bt8xxgpio.c
Simple merge

diff --cc drivers/gpio/mcp23s08.c
Simple merge

diff --cc drivers/gpio/pca953x.c
Simple merge

diff --cc drivers/gpio/pcf857x.c
Simple merge