linux-imx

UBI: fastmap: use ubi_rb_for_each_entry() in unmap_peb()

Use the ubi_rb_for_each_entry() macro instead of open-coding it.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>