avcodec/allcodecs: move sdx2 to correct place

libavcodec/allcodecs.c

@@ -275,7 +275,6 @@ extern AVCodec ff_s302m_decoder;
 extern AVCodec ff_sanm_decoder;
 extern AVCodec ff_scpr_decoder;
 extern AVCodec ff_screenpresso_decoder;
-extern AVCodec ff_sdx2_dpcm_decoder;
 extern AVCodec ff_sgi_encoder;
 extern AVCodec ff_sgi_decoder;
 extern AVCodec ff_sgirle_decoder;
@@ -574,6 +573,7 @@ extern AVCodec ff_gremlin_dpcm_decoder;
 extern AVCodec ff_interplay_dpcm_decoder;
 extern AVCodec ff_roq_dpcm_encoder;
 extern AVCodec ff_roq_dpcm_decoder;
+extern AVCodec ff_sdx2_dpcm_decoder;
 extern AVCodec ff_sol_dpcm_decoder;
 extern AVCodec ff_xan_dpcm_decoder;