wlan: Add qwlanfw_defs.h to resolve the compiler error

Compilation Error. Change 664372 (Promote request by stng) removes the
"qwlanfw_defs.h" in rel/2.0 API branch. This is causing compilation
error as no qwlanfw_defs.h is present on the host side

Change-Id: I35f0a91424ec11785bb8d6a7e93a747c9db44efa
CR-Fixed: 434878
(cherry picked from commit 012623ab9a84578d257952bb494f7bcd57e764e8)
diff --git a/riva/inc/halLegacyPalTypes.h b/riva/inc/halLegacyPalTypes.h
index 09c9892..f4c6281 100644
--- a/riva/inc/halLegacyPalTypes.h
+++ b/riva/inc/halLegacyPalTypes.h
@@ -55,7 +55,7 @@
  *
  *=========================================================================*/
 
-#include "wlan_defs.h"
+#include "qwlanfw_defs.h"
 
 /* Common type definitions */
 typedef uint8     tANI_U8;