ASoC: rsnd: delete unneeded test before of_node_put

ASoC: rsnd: delete unneeded test before of_node_put

Of_node_put supports NULL as its argument, so the initial test is not
necessary.

Suggested by Uwe Kleine-König.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e;
@@

-if (e)
   of_node_put(e);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@linaro.org>
(cherry picked from commit a493b6a637e9d8e828d7ed4be4bdf24dfd1f9250)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>