mtd: rawnand: mtk: Fix init error path

Reviewing a series converting the for_each_chil_of_node() loops into
their _scoped variants made me realize there was no cleanup of the
already registered NAND devices upon error which may leak memory on
systems with more than a chip when this error occurs. We should call the
_nand_chips_cleanup() function when this happens.

Fixes: 1d6b1e464950 ("mtd: mediatek: driver for MTK Smart Device")
Signed-off-by: Miquel Raynal <[e-mail]>
Reviewed-by: Pratyush Yadav <[e-mail]>
Reviewed-by: Matthias Brugger <[e-mail]>
Link: https://lore.kernel.org/linux-mtd/[e-mail]

drivers/mtd/nand/raw/mtk_nand.c

···
 
 	for_each_child_of_node_scoped(np, nand_np) {
 		ret = mtk_nfc_nand_chip_init(dev, nfc, nand_np);
-		if (ret)
+		if (ret) {
+			mtk_nfc_nand_chips_cleanup(nfc);
 			return ret;
+		}
 	}
 
 	return 0;