lavf/mov: Force HEVC codec_id for code-point dvh1 and an hvcC atom.

The mp4 registration authority accepted a code-point for Dolby Vision
HEVC that was already used as a fourcc for DVCPRO 100.

Fixes ticket #7347.

libavformat/mov.c

@@ -1902,6 +1902,8 @@ static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
     if (ret < 0)
         return ret;
+    if (atom.type == MKTAG('h','v','c','C') && st->codecpar->codec_tag == MKTAG('d','v','h','1'))
+        st->codecpar->codec_id = AV_CODEC_ID_HEVC;
 
     return 0;
 }