Add missing iounmap() before return from ccio_probe(), if ccio_init_resources()
fails.

Fixes: d46c742f ("parisc: ccio-dma: Handle kmalloc failure in ccio_init_resources()")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Helge Deller <deller@gmx.de>