Blackfin: fix up EBIU defines

The EBIU defines for EBSZ 256/512 were incorrect.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

include/asm-blackfin/mach-common/bits/ebiu.h

@@ -357,8 +357,8 @@
 #define EBSZ_32		0x0002		/* SDRAM External Bank Size = 32MB */
 #define EBSZ_64		0x0004		/* SDRAM External Bank Size = 64MB */
 #define EBSZ_128	0x0006		/* SDRAM External Bank Size = 128MB */
-#define EBSZ_256	0x0007		/* SDRAM External Bank Size = 256MB */
-#define EBSZ_512	0x0008		/* SDRAM External Bank Size = 512MB */
+#define EBSZ_256	0x0008		/* SDRAM External Bank Size = 256MB */
+#define EBSZ_512	0x000A		/* SDRAM External Bank Size = 512MB */
 #define EBCAW_8		0x0000		/* SDRAM External Bank Column Address Width = 8 Bits */
 #define EBCAW_9		0x0010		/* SDRAM External Bank Column Address Width = 9 Bits */
 #define EBCAW_10	0x0020		/* SDRAM External Bank Column Address Width = 10 Bits */