[Blackfin] arch: fix bug - set right partition size in the board files

 - set default u-boot partition size to 256k
 - modify the offset with the size change
 - use mtd defines (append for offset and full for size)
   where applicable rather than churning constants when we dont have to

Signed-off-by: Grace Pan <grace.pan@analog.com>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/mach-bf527/boards/ezkit.c b/arch/blackfin/mach-bf527/boards/ezkit.c
index 337515f..a28d5df 100644
--- a/arch/blackfin/mach-bf527/boards/ezkit.c
+++ b/arch/blackfin/mach-bf527/boards/ezkit.c
@@ -180,8 +180,8 @@
 	},
 	{
 		.name = "File System",
-		.offset = 4 * SIZE_1M,
-		.size = (256 - 4) * SIZE_1M,
+		.offset = MTDPART_OFS_APPEND,
+		.size = MTDPART_SIZ_FULL,
 	},
 };
 
@@ -422,11 +422,11 @@
 	}, {
 		.name = "kernel",
 		.size = 0xe0000,
-		.offset = 0x20000
+		.offset = MTDPART_OFS_APPEND,
 	}, {
 		.name = "file system",
-		.size = 0x700000,
-		.offset = 0x00100000,
+		.size = MTDPART_SIZ_FULL,
+		.offset = MTDPART_OFS_APPEND,
 	}
 };