qcacmn: Move 11d offload functionality to separate file

Currently 11d offload functionality is in reg_host_11d.c and
reg_host_11d.h files and are getting controlled with a
feature flag HOST_11D_SCAN.
HOST_11D_SCAN flag is to enable host 11d scan and 11d offload
feature should not be controlled with this  flag.

Move 11d offload functionality to separate files
reg_offload_11d_scan.c and reg_offload_11d_scan.h.

Change-Id: Ia56fe7009f2f5f9317da9e0e22f15040fe19a20d
CRs-Fixed: 2382486

target_if/regulatory/inc/target_if_reg_lte.h

@@ -32,7 +32,7 @@
 #include "wmi_unified_api.h"
 #include "wmi_unified_reg_api.h"
 
-#ifdef CONFIG_LTE_COEX
+#ifdef LTE_COEX
 /**
  * tgt_if_regulatory_register_ch_avoid_event_handler() - Register avoid channel
  * list event handler

target_if/regulatory/src/target_if_reg_lte.c

@@ -22,7 +22,7 @@
  * This file contains regulatory target LTE interface
  */
 
-#ifdef CONFIG_LTE_COEX
+#ifdef LTE_COEX
 
 #include "target_if_reg_lte.h"