ASoC: fsl_ssi: No need call of_device_is_available()

The comment and the call to of_device_is_available() are not really
needed.

It is the expected behaviour to probe only the ssi nodes that are
enabled in the device tree.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Acked-by: NTimur Tabi <timur@tabi.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_ssi.c

@@ -1292,13 +1292,6 @@ static int fsl_ssi_probe(struct platform_device *pdev)
 	void __iomem *iomem;
 	char name[64];
 
-	/* SSIs that are not connected on the board should have a
-	 *      status = "disabled"
-	 * property in their device tree nodes.
-	 */
-	if (!of_device_is_available(np))
-		return -ENODEV;
-
 	of_id = of_match_device(fsl_ssi_ids, &pdev->dev);
 	if (!of_id || !of_id->data)
 		return -EINVAL;