avcodec/libx264: fix usage of AVComponentDescriptor depth field

AVComponentDescriptor.depth is not available in release/2.4

This fixes compilation of the libx264 wrapper.

Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/libx264.c

@@ -398,7 +398,7 @@ static av_cold int X264_init(AVCodecContext *avctx)
     x4->params.i_log_level          = X264_LOG_DEBUG;
     x4->params.i_csp                = convert_pix_fmt(avctx->pix_fmt);
 #if X264_BUILD >= 153
-    x4->params.i_bitdepth           = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth;
+    x4->params.i_bitdepth           = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1;
 #endif
 
     OPT_STR("weightp", x4->wpredp);
@@ -747,9 +747,6 @@ static const enum AVPixelFormat pix_fmts_all[] = {
     AV_PIX_FMT_YUVJ444P,
     AV_PIX_FMT_NV12,
     AV_PIX_FMT_NV16,
-#ifdef X264_CSP_NV21
-    AV_PIX_FMT_NV21,
-#endif
     AV_PIX_FMT_YUV420P10,
     AV_PIX_FMT_YUV422P10,
     AV_PIX_FMT_YUV444P10,