[media] V4L: mt9v022: fix pixel clock

The setup of the pixel clock is done wrong in the mt9v022 driver.
The 'Invert Pixel Clock' bit has to be set to 1 for falling edge
and not for rising. This is not clearly described in the data
sheet.

Tested on pcm037 and pcm027/pcm990.
Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/mt9v022.c

@@ -228,7 +228,7 @@ static int mt9v022_set_bus_param(struct soc_camera_device *icd,
 
 	flags = soc_camera_apply_sensor_flags(icl, flags);
 
-	if (flags & SOCAM_PCLK_SAMPLE_RISING)
+	if (flags & SOCAM_PCLK_SAMPLE_FALLING)
 		pixclk |= 0x10;
 
 	if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))