ACPICA: Changes for Cygwin compatibility

Allow generation of ACPICA apps on Cygwin.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index a568717..6ed15a0 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -91,7 +91,10 @@
 #define ACPI_USE_NATIVE_DIVIDE
 #endif
 
+#ifndef __cdecl
 #define __cdecl
+#endif
+
 #define ACPI_FLUSH_CPU_CACHE()
 #endif				/* __KERNEL__ */