[ARM] 4977/2: soc - pxa2xx-ac97 - Add missing clk_enable()

Add missing clk_enable()
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Neric miao <eric.y.miao@gmail.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

sound/soc/pxa/pxa2xx-ac97.c

@@ -314,6 +314,7 @@ static int pxa2xx_ac97_probe(struct platform_device *pdev)
 		ac97_clk = NULL;
 		goto err_irq;
 	}
+	clk_enable(ac97_clk);
 	return 0;
 
  err_irq: