[MTD] Fix potential leak in rfd_ftl_add_mtd

This fixes a leak in the !mtd->erasesize error path (Coverity 1765).
Signed-off-by: NFlorin Malita <fmalita@gmail.com>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

drivers/mtd/rfd_ftl.c

@@ -779,6 +779,7 @@ static void rfd_ftl_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
 	else {
 		if (!mtd->erasesize) {
 			printk(KERN_WARNING PREFIX "please provide block_size");
+			kfree(part);
 			return;
 		}
 		else