soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe

stable inclusion
from stable-v4.19.250
commit 4f5877bdf7b593e988f1924f4c3df6523f80b39c
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9LK64
CVE: CVE-2022-48693

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4f5877bdf7b593e988f1924f4c3df6523f80b39c



--------------------------------

commit 37d838de upstream.

of_find_matching_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

In brcmstb_init_sram, it pass dn to of_address_to_resource(),
of_address_to_resource() will call of_find_device_by_node() to take
reference, so we should release the reference returned by
of_find_matching_node().

Fixes: 0b741b82 ("soc: bcm: brcmstb: Add support for S2/S3/S5 suspend states (ARM)")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Li Huafei <lihuafei1@huawei.com>