include/h264-ctrls.h, src/config.c: rename to V4L2_PIX_FMT_H264_SLICE

Kernel mainline renamed V4L2_PIX_FMT_H264_SLICE_RAW → V4L2_PIX_FMT_H264_SLICE
some time after this library went dormant (the 'S264' fourcc value is
unchanged; only the C identifier moved). The two definitions have the same
value so this is purely cosmetic at runtime, but keeping the name aligned
with linux/videodev2.h matches downstream patches (e.g. bootlin PR #38)
and avoids confusion when reading kernel + library side-by-side.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

include/h264-ctrls.h

@@ -14,7 +14,7 @@
 #include <linux/videodev2.h>
 
 /* Our pixel format isn't stable at the moment */
-#define V4L2_PIX_FMT_H264_SLICE_RAW v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
+#define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
 
 /*
  * This is put insanely high to avoid conflicting with controls that

src/config.c

@@ -128,7 +128,7 @@ VAStatus RequestQueryConfigProfiles(VADriverContextP context,
 
 	found = v4l2_find_format(driver_data->video_fd,
 				 V4L2_BUF_TYPE_VIDEO_OUTPUT,
-				 V4L2_PIX_FMT_H264_SLICE_RAW);
+				 V4L2_PIX_FMT_H264_SLICE);
 	if (found && index < (V4L2_REQUEST_MAX_CONFIG_ATTRIBUTES - 5)) {
 		profiles[index++] = VAProfileH264Main;
 		profiles[index++] = VAProfileH264High;