sound/soc/kirkwood/kirkwood-i2s.c: add missing kfree

Adjust the goto to jump to the error handling code that includes kfree.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier x;
expression E1!=0,E2,E3,E4;
statement S;
iterator I;
@@

(
if (...) { ... when != kfree(x)
               when != x = E3
               when != E3 = x
*  return ...;
 }
... when != x = E2
    when != I(...,x,...) S
if (...) { ... when != x = E4
 kfree(x); ... return ...; }
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/kirkwood/kirkwood-i2s.c

@@ -424,7 +424,7 @@ static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev)
 	if (!priv->mem) {
 		dev_err(&pdev->dev, "request_mem_region failed\n");
 		err = -EBUSY;
-		goto error;
+		goto error_alloc;
 	}
 
 	priv->io = ioremap(priv->mem->start, SZ_16K);