frontends/vdpau: disable UseStRpsBits for vdpau hevc

vdpau interface doesn't provide st_rps_bits, it uses NumDeltaPocsOfRefRpsIdx
instead. So disabling the flag to indicate st_rps_bits will not be used.

Signed-off-by: Boyuan Zhang <boyuan.zhang@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10889>

src/gallium/frontends/vdpau/decode.c

@@ -519,6 +519,7 @@ vlVdpDecoderRenderH265(struct pipe_h265_picture_desc *picture,
    memcpy(picture->RefPicSetStCurrAfter, picture_info->RefPicSetStCurrAfter, 8);
    memcpy(picture->RefPicSetLtCurr, picture_info->RefPicSetLtCurr, 8);
    picture->UseRefPicList = false;
+   picture->UseStRpsBits = false;
 
    return VDP_STATUS_OK;
 }