mtd: maps: pxa2xx-flash: fix memory leak in probe

[ Upstream commit 2399401feee27c639addc5b7e6ba519d3ca341bf ]

Free 'info' upon remapping error to avoid a memory leak.

Fixes: e644f7d6 ("[MTD] MAPS: Merge Lubbock and Mainstone drivers into common PXA2xx driver")
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
[<miquel.raynal@bootlin.com>: Reword the commit log]
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20221119073307.22929-1-zhengyongjun3@huawei.com


Signed-off-by: Sasha Levin <sashal@kernel.org>