irqchip/gic/realview: Fix refcount leak in realview_gic_of_init

stable inclusion
from stable-4.19.249
commit b634af84bc1edece4e63317b0ad95618dd3a8693
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5I4FP


CVE: NA

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

[ Upstream commit f4b98e31 ]

of_find_matching_node_and_match() 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.

Fixes: 82b0a434 ("irqchip/gic/realview: Support more RealView DCC variants")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220601080930.31005-2-linmq006@gmail.com


Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>