BACKPORT: optee: fix invalid of_node_put() in optee_driver_init()

The first node supplied to of_find_matching_node() has its reference
counter decreased as part of call to that function. In optee_driver_init()
after calling of_find_matching_node() it's invalid to call of_node_put() on
the supplied node again.

So remove the invalid call to of_node_put().

Change-Id: Ibc0a31192d94e79c1487d72bb1e5628206fcf408
Reported-by: Alex Shi <alex.shi@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
(cherry picked from commit f044113113dd95ba73916bde10e804d3cdfa2662)
Signed-off-by: Victor Chong <victor.chong@linaro.org>

drivers/tee/optee/core.c

diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
index 7952357..edb6e4e 100644
--- a/drivers/tee/optee/core.c
+++ b/drivers/tee/optee/core.c
@@ -590,7 +590,6 @@
 		return -ENODEV;
 
 	np = of_find_matching_node(fw_np, optee_match);
-	of_node_put(fw_np);
 	if (!np)
 		return -ENODEV;