video: driver: decouple fence structure from video buffer

Decouple fence structure from video buffer. Also add some
misc fence flow setup support.

Change-Id: Ia4e223a3a288f0dae3238850685f3a73d4b9400a
Signed-off-by: Akshata Sahukar <quic_asahukar@quicinc.com>

driver/vidc/inc/msm_vidc_inst.h

@@ -145,6 +145,7 @@ struct msm_vidc_inst {
 	struct list_head                   children_list;
 	struct list_head                   firmware_list;
 	struct list_head                   pending_pkts; /* list of struct hfi_pending_packet */
+	struct list_head                   fence_list; /* list of struct msm_vidc_fence */
 	bool                               once_per_session_set;
 	bool                               ipsc_properties_set;
 	bool                               opsc_properties_set;
@@ -154,7 +155,7 @@ struct msm_vidc_inst {
 	struct msm_vidc_statistics         stats;
 	struct msm_vidc_inst_capability   *capabilities;
 	struct completion                  completions[MAX_SIGNAL];
-	struct msm_vidc_fence_context      fence;
+	struct msm_vidc_fence_context      fence_context;
 	enum priority_level                priority_level;
 	u32                                firmware_priority;
 	bool                               active;