qcacmn: Add qdf_platform source file to qdf/Kbuild

Add qdf_platform source file to qdf/Kbuild and
clean-up WAR introduced in change
I8172f3dbe0716be24a4dda739afb49f94528a4f6

Change-Id: Icb76d53544590b8bcace275ef52870606fb5d826

target_if/regulatory/src/target_if_reg.c

@@ -30,9 +30,7 @@
 #include <target_if_reg.h>
 #include <wmi_unified_reg_api.h>
 #include <wlan_reg_ucfg_api.h>
-#ifdef CONFIG_MCL
 #include <qdf_platform.h>
-#endif
 
 static inline uint32_t get_chan_list_cc_event_id(void)
 {
@@ -105,12 +103,10 @@ static int tgt_reg_chan_list_update_handler(ol_scn_t handle,
 
 	TARGET_IF_ENTER();
 
-#ifdef CONFIG_MCL
 	if (qdf_is_fw_down()) {
 		target_if_debug("ignore chan list update evt in ssr");
 		return 0;
 	}
-#endif
 
 	psoc = target_if_get_psoc_from_scn_hdl(handle);
 	if (!psoc) {