qcacmn: add set/get APIs for max active scans

Add set/get API for max parallel active scans supported.
Max active scans allowed is set from ext service ready event
handler(8 as of now). Once FW announces this capability, FW
announce value must be used instead of hardcoded value 8.

Change-Id: I2af3a34c9f55f92c47aebbd12838a8d8fc6e3ba7
CRs-Fixed: 1095299

target_if/init_deinit/inc/service_ready_event_handler.h

@@ -36,6 +36,7 @@
 #include "wmi_unified_param.h"
 #include "wlan_objmgr_psoc_obj.h"
 #include "target_if.h"
+#include "target_if_scan.h"
 
 /**
  * init_deinit_service_ready_event_handler() - service ready handler

target_if/init_deinit/src/service_ready_event_handler.c

@@ -319,6 +319,8 @@ int init_deinit_service_ext_ready_event_handler(ol_scn_t scn_handle,
 
 	wlan_objmgr_populate_ext_service_ready_data(psoc, service_param);
 
+	target_if_scan_set_max_active_scans(psoc,
+			WLAN_MAX_ACTIVE_SCANS_ALLOWED);
 free_param_and_exit:
 	qdf_mem_free(service_param);