headers_check fix: linux/video_decoder.h

fix the following 'make headers_check' warning:

  usr/include/linux/video_decoder.h:7: found __[us]{8,16,32,64} type without #include <linux/types.h>

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
diff --git a/include/linux/video_decoder.h b/include/linux/video_decoder.h
index 121e26d..e26c0c8 100644
--- a/include/linux/video_decoder.h
+++ b/include/linux/video_decoder.h
@@ -1,6 +1,8 @@
 #ifndef _LINUX_VIDEO_DECODER_H
 #define _LINUX_VIDEO_DECODER_H
 
+#include <linux/types.h>
+
 #define HAVE_VIDEO_DECODER 1
 
 struct video_decoder_capability { /* this name is too long */