staging: media: tegra-video: Fix -Wmaybe-unitialized warn in gcc

Make sure that tegra20_vi_get_input_formats always assign a value for
yuv_input_format.

Fix:
drivers/staging/media/tegra-video/tegra20.c:624:72: warning: ‘yuv_input_format’ may be used uninitialized [-Wmaybe-uninitialized]
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/staging/media/tegra-video/tegra20.c

@@ -164,6 +164,7 @@ static void tegra20_vi_get_input_formats(struct tegra_vi_channel *chan,
 	unsigned int input_mbus_code = chan->fmtinfo->code;
 
 	(*main_input_format) = VI_INPUT_INPUT_FORMAT_YUV422;
+	(*yuv_input_format) = VI_INPUT_YUV_INPUT_FORMAT_UYVY;
 
 	switch (input_mbus_code) {
 	case MEDIA_BUS_FMT_UYVY8_2X8: