mtd: ssfdc: One function call less in ssfdcr_add_mtd() after error detection

The kfree() function was called in one case by
the ssfdcr_add_mtd() function during error handling
even if the passed data structure member contained a null pointer.
This issue was detected by using the Coccinelle software.

Thus use another label.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/56d92e42-db9e-4767-bcb1-9686bdf34a03@web.de

Author: elfring

drivers/mtd/ssfdc.c

@@ -332,7 +332,7 @@ static void ssfdcr_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
 		kmalloc_array(ssfdc->map_len,
 			      sizeof(ssfdc->logic_block_map[0]), GFP_KERNEL);
 	if (!ssfdc->logic_block_map)
-		goto out_err;
+		goto out_free_ssfdc;
 	memset(ssfdc->logic_block_map, 0xff, sizeof(ssfdc->logic_block_map[0]) *
 		ssfdc->map_len);
 
@@ -350,6 +350,7 @@ static void ssfdcr_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
 
 out_err:
 	kfree(ssfdc->logic_block_map);
+out_free_ssfdc:
         kfree(ssfdc);
 }