exynos5250: #define the dram controller interleaving size

Change-Id: Iab184aa85be68b6ca5107d278d2fe821e5b2e611
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2255
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/cpu/samsung/exynos5250/dmc.h

@@ -175,6 +175,8 @@ enum mem_manuf {
 	MEM_MANUF_COUNT = 2, // fancy that.
 };
 
+#define DMC_INTERLEAVE_SIZE		0x1f
+
 /* CONCONTROL register fields */
 #define CONCONTROL_DFI_INIT_START_SHIFT	28
 #define CONCONTROL_RD_FETCH_SHIFT	12