jffs2: add sector_size field to part_info structure

This patch adds sector_size field to part_info structure (used
by new JFFS2 code).

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
diff --git a/include/jffs2/load_kernel.h b/include/jffs2/load_kernel.h
index e9b7d6e..8b2720e 100644
--- a/include/jffs2/load_kernel.h
+++ b/include/jffs2/load_kernel.h
@@ -50,6 +50,7 @@
 	u32 offset;			/* offset within device */
 	void *jffs2_priv;		/* used internaly by jffs2 */
 	u32 mask_flags;			/* kernel MTD mask flags */
+	u32 sector_size;		/* size of sector */
 	struct mtd_device *dev;		/* parent device */
 };