video: Added more validations

Fixes for KW security issues.
CRs-Fixed: 2836558

Change-Id: I0c8ca6b13c00420a50b8518caea6ad51ed1268bb
Signed-off-by: Karthikeyan Periasamy <kperiasa@codeaurora.org>

driver/variant/iris2/src/msm_vidc_iris2.c

@@ -616,7 +616,7 @@ int msm_vidc_decide_work_route_iris2(struct msm_vidc_inst* inst)
 
 int msm_vidc_decide_quality_mode_iris2(struct msm_vidc_inst* inst)
 {
-	struct msm_vidc_inst_capability* capability = inst->capabilities;
+	struct msm_vidc_inst_capability* capability = NULL;
 	struct msm_vidc_core *core;
 	u32 mbpf, mbps, max_hq_mbpf, max_hq_mbps;
 	u32 mode;
@@ -626,6 +626,8 @@ int msm_vidc_decide_quality_mode_iris2(struct msm_vidc_inst* inst)
 		return -EINVAL;
 	}
 
+	capability = inst->capabilities;
+
 	if (!is_encode_session(inst))
 		return 0;