qcacmn: Send channel switch request instead of doing SAP restart

Send channel switch request instead of performing SAP restart when
doing a MCC to SCC switch. This is controlled using the existing INI
item 'gWlanMccToSccSwitchMode'. The new value of '3' will perform
this channel change by sending (E)/CSA whereas the old value of '2'
can still be used to do a channel change by doing SAP restart.

Change-Id: I79e7317219503de0a9957940f3cf7a4e91c7a521
CRs-Fixed: 986202

qdf/inc/qdf_types.h

@@ -354,6 +354,7 @@ typedef enum {
 	QDF_MCC_TO_SCC_SWITCH_DISABLE = 0,
 	QDF_MCC_TO_SCC_SWITCH_ENABLE,
 	QDF_MCC_TO_SCC_SWITCH_FORCE,
+	QDF_MCC_TO_SCC_SWITCH_FORCE_WITHOUT_DISCONNECTION,
 	QDF_MCC_TO_SCC_SWITCH_MAX
 } tQDF_MCC_TO_SCC_SWITCH_MODE;
 #endif