Quoting Nicholas Mc Guire (2018-07-13 04:13:20)

of_find_compatible_node() is returning a device node with refcount
incremented and must be explicitly decremented after the last use
which is right after the us in of_iomap() here.

Signed-off-by: Nicholas Mc Guire <redacted>
Fixes: commit 787b4271a6a0 ("clk: imx: add imx6ul clk tree support")

This is not how a Fixes line works. It doesn't have 'commit'. I'll
remove it when applying so no need to resend.