[patch] video: build fix for drivers/media/video/mt9v022.c

[Ingo Molnar <mingo@elte.hu>]

x86.git testing found the following build bug on latest -git:

  CC [M]  drivers/media/video/mt9v022.o
  drivers/media/video/mt9v022.c: In function 'bus_switch_request':
  drivers/media/video/mt9v022.c:199: error: implicit declaration of function 'gpio_is_valid'
  drivers/media/video/mt9v022.c:201: error: implicit declaration of function 'gpio_request'
  drivers/media/video/mt9v022.c:207: error: implicit declaration of function 'gpio_direction_output'
  drivers/media/video/mt9v022.c:211: error: implicit declaration of function 'gpio_free'
  drivers/media/video/mt9v022.c: In function 'bus_switch_act':
  drivers/media/video/mt9v022.c:237: error: implicit declaration of function 'gpio_set_value_cansleep'
  make[2]: *** [drivers/media/video] Error 2
  make[1]: *** [drivers/media] Error 2
  make[1]: *** Waiting for unfinished jobs....
  make: *** [drivers] Error 2

with this config:

   http://redhat.com/~mingo/misc/config-Sat_May__3_16_08_39_CEST_2008.bad

the bug was that the driver uses GPIO functionality but only includes 
the GPIO interface definitions for the CONFIG_MT9M001_PCA9536_SWITCH 
case, which was not set in this config.

The quick fix seems to be to include linux/gpio.h unconditionally. (this 
seems like a small cleanup as well as it removes and #ifdef is more 
robust than an inclusion of asm/gpio.h) Not tested too much yet, so 
please have another look in any case.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 drivers/media/video/mt9v022.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

Index: linux/drivers/media/video/mt9v022.c
===================================================================
--- linux.orig/drivers/media/video/mt9v022.c
+++ linux/drivers/media/video/mt9v022.c
@@ -13,15 +13,12 @@
 #include <linux/i2c.h>
 #include <linux/delay.h>
 #include <linux/log2.h>
+#include <linux/gpio.h>
 
 #include <media/v4l2-common.h>
 #include <media/v4l2-chip-ident.h>
 #include <media/soc_camera.h>
 
-#ifdef CONFIG_MT9M001_PCA9536_SWITCH
-#include <asm/gpio.h>
-#endif
-
 /* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
  * The platform has to define i2c_board_info
  * and call i2c_register_board_info() */