mtd: nand_ids: improve LEGACY_ID_NAND macro a bit

Notice that all the flashes belonging to the "legacy ID" class have 512 bytes
NAND page. This means we may simplify the 'LEGACY_ID_NAND()' macro as well as
the NAND ID table a little.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 13786f0..ebf970e 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -552,12 +552,11 @@
 /*
  * A helper for defining older NAND chips where the second ID byte fully
  * defined the chip, including the geometry (chip size, eraseblock size, page
- * size).
+ * size). All these chips have 512 bytes NAND page size.
  */
-#define LEGACY_ID_NAND(nm, devid, pagesz, chipsz, erasesz, opts)       \
-	{ .name = (nm), {{ .dev_id = (devid) }}, .pagesize = (pagesz), \
-	  .chipsize = (chipsz), .erasesize = (erasesz),                \
-	  .options = (opts) }
+#define LEGACY_ID_NAND(nm, devid, chipsz, erasesz, opts)          \
+	{ .name = (nm), {{ .dev_id = (devid) }}, .pagesize = 512, \
+	  .chipsize = (chipsz), .erasesize = (erasesz), .options = (opts) }
 
 /*
  * A helper for defining newer chips which report their page size and