mtd: rawnand: ingenic: Fix missing put_device in ingenic_ecc_get

If of_find_device_by_node() succeeds, ingenic_ecc_get() doesn't have
a corresponding put_device(). Thus add put_device() to fix the exception
handling.

Fixes: 15de8c6e

 ("mtd: rawnand: ingenic: Separate top-level and SoC specific code")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211230072751.21622-1-linmq006@gmail.com