ASoC: kirkwood: Fix compile error due to patch 'add S/PDIF support'

This patch fixes the compilation error of kirkwood-i2s.c introduced
by the commit 75b9b65ee5 'ASoC: kirkwood: add S/PDIF support'.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/kirkwood/kirkwood-i2s.c

@@ -568,7 +568,7 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
 		} else {
 			dev_info(&pdev->dev, "found external clock\n");
 			clk_prepare_enable(priv->extclk);
-			soc_dai = &kirkwood_i2s_dai_extclk;
+			soc_dai = kirkwood_i2s_dai_extclk;
 		}
 	}