powerpc/85xx: Add T4160RDB board support

T4160RDB shares the same platform as T4240RDB. T4160 is
a low power version of T4240, with the eight e6500 cores,
two DDR3 controllers, and same peripheral bus interfaces.

Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/configs/T4240RDB.h b/include/configs/T4240RDB.h
index b1a8053..183255d 100644
--- a/include/configs/T4240RDB.h
+++ b/include/configs/T4240RDB.h
@@ -678,7 +678,11 @@
  * interleaving. It can be cacheline, page, bank, superbank.
  * See doc/README.fsl-ddr for details.
  */
+#ifdef CONFIG_PPC_T4240
 #define CTRL_INTLV_PREFERED 3way_4KB
+#else
+#define CTRL_INTLV_PREFERED cacheline
+#endif
 
 #define	CONFIG_EXTRA_ENV_SETTINGS				\
 	"hwconfig=fsl_ddr:"					\