avcodec/opus_celt: Break cyclic inlusion of opus_celt.h<->opus_pvq.h

Simply don't include opus_pvq.h in opus_celt.h: The latter only
uses pointers to CeltPVQ.

Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/opus.c

@@ -22,6 +22,7 @@
 #include <stdint.h>
 
 #include "opus_celt.h"
+#include "opus_pvq.h"
 #include "opustab.h"
 
 void ff_celt_quant_bands(CeltFrame *f, OpusRangeCoder *rc)

libavcodec/opus_celt.h

@@ -27,7 +27,6 @@
 #include <float.h>
 
 #include "opus.h"
-#include "opus_pvq.h"
 #include "opusdsp.h"
 
 #include "libavutil/float_dsp.h"