ASoC: pxa2xx-i2s: Fix inappropriate release of i2s clock

i2s_clk is 'put' for no reason in pxa2xx_i2s_shutdown.
Now we 'get' i2s_clk at probe and 'put' it at driver removal or when
probe fails.

Signed-off-by: Karl Beldan <karl.beldan@mobile-devices.fr>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/pxa/pxa2xx-i2s.c b/sound/soc/pxa/pxa2xx-i2s.c
index 115b471..bc12a09 100644
--- a/sound/soc/pxa/pxa2xx-i2s.c
+++ b/sound/soc/pxa/pxa2xx-i2s.c
@@ -257,8 +257,6 @@
 		pxa_i2s_wait();
 		clk_disable(clk_i2s);
 	}
-
-	clk_put(clk_i2s);
 }
 
 #ifdef CONFIG_PM