video: driver: handle multiple read only buffers

when fw sends FBDs with read only flag for second time,
do not send vb2 buffer done on that buffer.

Change-Id: Iacf6fe87403664f2063b9d2e1859323506fa22a8
Signed-off-by: Darshana Patil <darshana@codeaurora.org>

driver/vidc/inc/msm_vidc_internal.h

@@ -160,6 +160,7 @@ enum msm_vidc_buffer_attributes {
 	MSM_VIDC_ATTR_PENDING_RELEASE           = BIT(2),
 	MSM_VIDC_ATTR_QUEUED                    = BIT(3),
 	MSM_VIDC_ATTR_DEQUEUED                  = BIT(4),
+	MSM_VIDC_ATTR_BUFFER_DONE               = BIT(5),
 };
 
 enum msm_vidc_buffer_region {