media: ov7670: restore default settings after power-up

Since commit 3d6a8fe2 ("media: ov7670: hook s_power onto v4l2 core"),
the device is actually powered off while the video stream is stopped.

The frame format and framerate are restored right after power-up, but
restoring the default register settings is forgotten.

Fixes: 3d6a8fe2 ("media: ov7670: hook s_power onto v4l2 core")

Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Lubomir Rintel <lkundrak@v3.sk>
Tested-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/i2c/ov7670.c

@@ -1664,6 +1664,7 @@ static int ov7670_s_power(struct v4l2_subdev *sd, int on)
 
 	if (on) {
 		ov7670_power_on (sd);
+		ov7670_init(sd, 0);
 		ov7670_apply_fmt(sd);
 		ov7675_apply_framerate(sd);
 		v4l2_ctrl_handler_setup(&info->hdl);