qca-wifi: Address compilation issues

Address the compilation issues when the DFS feature Auto channel
switch support is disabled(WLAN_DFS_PRECAC_AUTO_CHAN_SUPPORT=0).

Change-Id: I6eda4bf133552e145a49a60aea50a0ce29a11373
CRs-Fixed: 2608450

umac/dfs/core/src/misc/dfs_zero_cac.c

@@ -4599,6 +4599,7 @@ int32_t dfs_set_precac_intermediate_chan(struct wlan_dfs *dfs, uint32_t value)
  * dfs_get_precac_intermediate_chan() - Get interCAC channel.
  * @dfs: Pointer to wlan_dfs.
  */
+#ifdef WLAN_DFS_PRECAC_AUTO_CHAN_SUPPORT
 #ifdef CONFIG_CHAN_FREQ_API
 uint32_t dfs_get_precac_intermediate_chan(struct wlan_dfs *dfs)
 {
@@ -4612,6 +4613,7 @@ uint32_t dfs_get_precac_intermediate_chan(struct wlan_dfs *dfs)
 }
 #endif
 #endif
+#endif
 
 #ifdef QCA_SUPPORT_AGILE_DFS
 void dfs_reset_agile_config(struct dfs_soc_priv_obj *dfs_soc)