qcacmn: Check if inter-band switch is allowed in random channel selection

During DFS random channel selection, in the function
utils_dfs_get_channel_list, check if inter-band channel switch is
allowed before adding the inter-band channels in the channel list,
from which a random channel is selected as the target channel.

Change-Id: I3f6c88788819039c4b562b462a922edf1baafe12
CRs-Fixed: 2771640

umac/dfs/dispatcher/inc/wlan_dfs_mlme_api.h

@@ -443,6 +443,15 @@ void dfs_mlme_handle_dfs_scan_violation(struct wlan_objmgr_pdev *pdev)
  */
 bool dfs_mlme_is_opmode_sta(struct wlan_objmgr_pdev *pdev);
 
+/**
+ * dfs_mlme_is_inter_band_chan_switch_allowed() - Check if inter-band channel
+ * switch is allowed.
+ * @pdev: Pointer to DFS pdev object.
+ *
+ * Return: true if inter-band channel switch is allowed.
+ */
+bool dfs_mlme_is_inter_band_chan_switch_allowed(struct wlan_objmgr_pdev *pdev);
+
 /**
  * dfs_mlme_acquire_radar_mode_switch_lock() - Acquire lock for radar processing
  * over mode switch handling.

umac/dfs/dispatcher/inc/wlan_dfs_ucfg_api.h

@@ -256,6 +256,8 @@ struct dfs_to_mlme {
 			(struct wlan_objmgr_pdev *pdev,
 			 uint16_t freq,
 			 enum WLAN_DFS_EVENTS event);
+	bool (*mlme_is_inter_band_chan_switch_allowed)
+			(struct wlan_objmgr_pdev *pdev);
 	void (*mlme_acquire_radar_mode_switch_lock)
 			(struct wlan_objmgr_pdev *pdev);
 	void (*mlme_release_radar_mode_switch_lock)