google/link, lenovo/x60: i915io.c: Use define `ARRAY_SIZE`

Change-Id: I8ddd46a573b61eba685efcc15456f288645d214d
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/5936
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/mainboard/google/link/i915io.c

@@ -355,4 +355,4 @@ struct iodef iodefs[] = {
 	{I,},
 };
 
-int niodefs = sizeof (iodefs) / sizeof (iodefs[0]);
+int niodefs = ARRAY_SIZE(iodefs);

src/mainboard/lenovo/x60/i915io.c

@@ -2270,4 +2270,4 @@ struct iodef iodefs[] = {
 {0,},
 };
 
-int niodefs = sizeof(iodefs) / sizeof(iodefs[0]);
+int niodefs = ARRAY_SIZE(iodefs);