media: ipu3-imgu: Set valid initial format

The initial format did not have a valid size.

Fixes v4l2-compliance:

fail: v4l2-test-formats.cpp(723): Video Output Multiplanar:
				  TRY_FMT(G_FMT) != G_FMT
test VIDIOC_TRY_FMT: FAIL
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/ipu3/ipu3-v4l2.c

@@ -1136,7 +1136,9 @@ static int imgu_v4l2_node_setup(struct imgu_device *imgu, unsigned int pipe,
 	def_pix_fmt.height = def_bus_fmt.height;
 	def_pix_fmt.field = def_bus_fmt.field;
 	def_pix_fmt.num_planes = 1;
-	def_pix_fmt.plane_fmt[0].bytesperline = def_pix_fmt.width * 2;
+	def_pix_fmt.plane_fmt[0].bytesperline =
+		imgu_bytesperline(def_pix_fmt.width,
+				  IMGU_ABI_FRAME_FORMAT_RAW_PACKED);
 	def_pix_fmt.plane_fmt[0].sizeimage =
 		def_pix_fmt.height * def_pix_fmt.plane_fmt[0].bytesperline;
 	def_pix_fmt.flags = 0;