tree: Run clang-format to conform to the kernel coding style

The coding style has been a bit erratic. Enforce the linux kernel coding
style by reusing their .clang-format file, running clang-format on the
source, and ignoring the few shortcomings that clang-format has at the
moment (especially on aligning the define values).

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

src/video.c

@@ -22,17 +22,17 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
 #include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/ioctl.h>
 
-#include <linux/videodev2.h>
 #include <drm_fourcc.h>
+#include <linux/videodev2.h>
 
-#include "video.h"
 #include "utils.h"
+#include "video.h"
 
 static inline unsigned int video_v4l2_format(bool tiled_format)
 {