mtd: rawnand: omap2: fix the probe function error path

An error after nand_scan_tail() should trigger a nand_cleanup().
The helper mtd_device_parse_register() returns an error code that should
be checked and nand_cleanup() called accordingly.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>

drivers/mtd/nand/raw/omap2.c

@@ -2263,12 +2263,15 @@ scan_tail:
 
 	err = mtd_device_register(mtd, NULL, 0);
 	if (err)
-		goto return_error;
+		goto cleanup_nand;
 
 	platform_set_drvdata(pdev, mtd);
 
 	return 0;
 
+cleanup_nand:
+	nand_cleanup(nand_chip);
+
 return_error:
 	if (!IS_ERR_OR_NULL(info->dma))
 		dma_release_channel(info->dma);