types.h: Add arch_uint_ptr to make comparing native pointer types easier

include/arch-generic/types.h

@@ -18,4 +18,5 @@
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-typedef unsigned int uint32;
+typedef unsigned long uint32;
+typedef unsigned long long uint64;

include/atags.h

@@ -42,7 +42,7 @@ struct atag_core {
 
 struct atag_mem {
 	uint32 size;	/* size of the area */
-	uint32 start;	/* physical start address */
+	arch_uint_ptr start;	/* physical start address */
 };
 
 struct atag {