backlight: tosa_bl: Include the right header

The Tosa backlight driver was converted to use GPIO descriptors
in 0b0cb52
("video: backlight: tosa: Use GPIO lookup table") but
still includes <linux/gpio.h> rather than <linux/gpio/consumer.h>.
Fix it.

Cc: Arnd Bergmann <[email protected]>
Cc: Robert Jarzmik <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Reviewed-by: Daniel Thompson <[email protected]>
Signed-off-by: Lee Jones <[email protected]>

Author: linusw

drivers/video/backlight/tosa_bl.c

@@ -11,7 +11,7 @@
 #include <linux/device.h>
 #include <linux/spi/spi.h>
 #include <linux/i2c.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/fb.h>
 #include <linux/backlight.h>
 #include <linux/slab.h>