config: set sizeof void pointer for LP64

Change-Id: I26b50db9dc1d3df084280ae08461ca651b7a66e1
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
diff --git a/config.h b/config.h
index 6827125..b82014c 100644
--- a/config.h
+++ b/config.h
@@ -113,7 +113,11 @@
 #define PACKAGE_VERSION ""
 
 /* The size of a `void*', as computed by sizeof. */
+#if __LP64__
+#define SIZEOF_VOIDP 8
+#else
 #define SIZEOF_VOIDP 4
+#endif
 
 /* Define to 1 if you have the ANSI C header files. */
 #define STDC_HEADERS 1