[MTD] Fix potential leak in rfd_ftl_add_mtd

This fixes a leak in the !mtd->erasesize error path (Coverity 1765).

Signed-off-by: Florin Malita <fmalita@gmail.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/drivers/mtd/rfd_ftl.c b/drivers/mtd/rfd_ftl.c
index d4b1ba8..006c03a 100644
--- a/drivers/mtd/rfd_ftl.c
+++ b/drivers/mtd/rfd_ftl.c
@@ -779,6 +779,7 @@
 	else {
 		if (!mtd->erasesize) {
 			printk(KERN_WARNING PREFIX "please provide block_size");
+			kfree(part);
 			return;
 		}
 		else