st/va: implement poc type

pic_order_cnt_type is a required variable when encoding both sps and
slice header, therefore we need to get this value from st, e.g. vaapi
interface, and then pass it to radeon driver for encoding headers.

Signed-off-by: Boyuan Zhang <boyuan.zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>

src/gallium/state_trackers/va/picture.c

@@ -396,6 +396,7 @@ handleVAEncSequenceParameterBufferType(vlVaDriver *drv, vlVaContext *context, vl
    context->desc.h264enc.gop_size = h264->intra_idr_period * context->gop_coeff;
    context->desc.h264enc.rate_ctrl.frame_rate_num = h264->time_scale / 2;
    context->desc.h264enc.rate_ctrl.frame_rate_den = h264->num_units_in_tick;
+   context->desc.h264enc.pic_order_cnt_type = h264->seq_fields.bits.pic_order_cnt_type;
    return VA_STATUS_SUCCESS;
 }