qcacmn: Fix implicit declaration error for TLV helper APIs

Include TLV helper header file to fix implict function decration warning
treated as error. These APIs are required only for TLV target, hence
put it under TLV compilation flag.

Change-Id: I50f3629b3f69c3cdb46e2384e47d2559c803cd4c
CRs-Fixed: 1090087

wmi/src/wmi_unified.c

@@ -40,6 +40,10 @@
 #include "wmi_unified_priv.h"
 #include "wmi_unified_param.h"
 
+#ifndef WMI_NON_TLV_SUPPORT
+#include "wmi_tlv_helper.h"
+#endif
+
 #include <linux/debugfs.h>
 
 /* This check for CONFIG_WIN temporary added due to redeclaration compilation