qcacmn: Add a null function for reg_modify_chan_list_for_indoor_channels

Add a null function for reg_modify_chan_list_for_indoor_channels
as it is not required for AP software.

Change-Id: I420521d66b332a9f2b01097092eeb94cd4301879
CRs-Fixed: 3221590

umac/regulatory/core/src/reg_build_chan_list.c

@@ -409,6 +409,7 @@ static void reg_modify_chan_list_for_dfs_channels(
  * indoor_chan_enabled flag is set to false.
  * @pdev_priv_obj: Pointer to regulatory private pdev structure.
  */
+#ifdef CONFIG_REG_CLIENT
 static void reg_modify_chan_list_for_indoor_channels(
 		struct wlan_regulatory_pdev_priv_obj *pdev_priv_obj)
 {
@@ -447,6 +448,12 @@ static void reg_modify_chan_list_for_indoor_channels(
 		}
 	}
 }
+#else
+static void reg_modify_chan_list_for_indoor_channels(
+		struct wlan_regulatory_pdev_priv_obj *pdev_priv_obj)
+{
+}
+#endif
 
 #ifdef CONFIG_BAND_6GHZ
 static void reg_modify_chan_list_for_band_6G(