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/utils.c

@@ -23,9 +23,9 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include <stdlib.h>
-#include <stdio.h>
 #include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 #include "sunxi_cedrus.h"
 #include "utils.h"