media: vicodec: Use vb2_find_buffer

Use the newly introduced vb2_find_buffer API to get a vb2_buffer
given a buffer timestamp.

Signed-off-by: Ezequiel Garcia <[e-mail]>
Acked-by: Tomasz Figa <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/test-drivers/vicodec/vicodec-core.c

···
 		 */
 		if (!(ntohl(ctx->state.header.flags) & V4L2_FWHT_FL_I_FRAME)) {
 			struct vb2_buffer *ref_vb2_buf;
-			int ref_buf_idx;
 			struct vb2_queue *vq_cap =
 				v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
 						V4L2_BUF_TYPE_VIDEO_CAPTURE);
 
-			ref_buf_idx = vb2_find_timestamp(vq_cap,
-							 ctx->state.ref_frame_ts, 0);
-			if (ref_buf_idx < 0)
+			ref_vb2_buf = vb2_find_buffer(vq_cap, ctx->state.ref_frame_ts);
+			if (!ref_vb2_buf)
 				return -EINVAL;
-
-			ref_vb2_buf = vq_cap->bufs[ref_buf_idx];
 			if (ref_vb2_buf->state == VB2_BUF_STATE_ERROR)
 				ret = -EINVAL;
 			ctx->state.ref_frame.buf =