cell_edac: fix missing of_node_put
cell_edac: fix missing of_node_put

Decrease device_node refcount np after task completion.

Signed-off-by: Libo Chen <03ac321f4fc44d5558b43fe86a753e021008f32d@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <0cae1d1e981e84d16b82ca3d17be8a7f826608d3@samsung.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs