qcacmn: A common function to get dfs_rx_ops

Instead of calling and defining the same function from different files,
have a common function in a header file and call it from different files.
The function retrieves the dfs rx_ops from the psoc context.

Change-Id: I1c9089c2508faa9ee7a5bf6645dcf02659923bc3
CRs-Fixed: 2001106

umac/global_umac_dispatcher/lmac_if/inc/wlan_lmac_if_api.h

@@ -66,6 +66,23 @@ wlan_lmac_if_get_mgmt_txrx_rx_ops(struct wlan_objmgr_psoc *psoc)
 	return &psoc->soc_cb.rx_ops.mgmt_txrx_rx_ops;
 }
 
+/**
+ * wlan_lmac_if_get_dfs_rx_ops() - retrieve the dfs rx_ops
+ * @psoc: psoc context
+ *
+ * API to retrieve the dfs rx_ops from the psoc context
+ *
+ * Return: dfs_rx_ops pointer
+ */
+static inline struct wlan_lmac_if_dfs_rx_ops *
+wlan_lmac_if_get_dfs_rx_ops(struct wlan_objmgr_psoc *psoc)
+{
+	if (!psoc)
+		return NULL;
+
+    return &psoc->soc_cb.rx_ops.dfs_rx_ops;
+}
+
 /**
  * mgmt_txrx_get_nbuf() - retrieve nbuf from mgmt desc_id
  * @psoc: psoc context