qcacmn: Add HIF changes to support qca6490

HIF changes to support qca6490 WLAN chipset.

Change-Id: I4b1be1770a2daf0a0db6f65f579831e3fcb10e79
CRs-Fixed: 2522133
diff --git a/hif/src/ce/ce_service_srng.c b/hif/src/ce/ce_service_srng.c
index 1e303c0..7018f4c 100644
--- a/hif/src/ce/ce_service_srng.c
+++ b/hif/src/ce/ce_service_srng.c
@@ -305,7 +305,7 @@
 	unsigned int sw_index;
 	uint64_t dma_addr = buffer;
 	struct hif_softc *scn = CE_state->scn;
-	struct ce_srng_dest_desc *dest_desc;
+	struct ce_srng_dest_desc *dest_desc = NULL;
 
 	qdf_spin_lock_bh(&CE_state->ce_index_lock);
 	write_index = dest_ring->write_index;