arm: dsputil: Add a bunch of missing #includes

libavcodec/arm/dsputil_init_arm.c

@@ -19,8 +19,13 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <stdint.h>
+
 #include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
 #include "libavutil/arm/cpu.h"
+#include "libavcodec/avcodec.h"
+#include "libavcodec/dsputil.h"
 #include "dsputil_arm.h"
 
 void ff_j_rev_dct_arm(int16_t *data);