wlan : disable clang warning

disable warning to fix compilation error with clang.

Change-Id: Ifdc0b361d980fdfaaf4da4d744035a318e32836d
CRs-Fixed: 2573428
diff --git a/Kbuild b/Kbuild
index c085b36..1380e71 100644
--- a/Kbuild
+++ b/Kbuild
@@ -760,7 +760,7 @@
 endif
 
 # Fix build for GCC 4.7
-EXTRA_CFLAGS += -Wno-maybe-uninitialized -Wno-unused-function
+EXTRA_CFLAGS += $(call cc-option,-Wno-maybe-uninitialized) -Wno-unused-function -Wno-enum-conversion -Wno-array-bounds -Wno-pointer-bool-conversion -Wno-parentheses-equality -Wno-typedef-redefinition -Wno-empty-body -Wno-non-literal-null-conversion
 
 ifeq ($(CONFIG_WLAN_OFFLOAD_PACKETS),y)
 CDEFINES += -DWLAN_FEATURE_OFFLOAD_PACKETS