ARM: zynq: Fix refcount leak in zynq_early_slcr_init

ARM: zynq: Fix refcount leak in zynq_early_slcr_init

[ Upstream commit 30f24a7e4f7ef10f7088091acdf448ac7a932d83 ]

of_find_compatible_node() returns a node pointer with refcount incremented,
we should use of_node_put() on error path.
Add missing of_node_put() to avoid refcount leak.

Fixes: 951b3b3d6be8 ("ARM: zynq: Simplify SLCR initialization")
Signed-off-by: Qiheng Lin <linqiheng@huawei.com>
Link: https://lore.kernel.org/r/20221129140544.41293-1-linqiheng@huawei.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>