soc: imx: Remove Layerscape check

Since commit 4ebd29f9 ("soc: imx: Register SoC device only on i.MX
boards") the soc-imx driver is only registered on i.MX platforms as
intended.

This means that we no longer need to do a specific check for
Layerscape.

Remove the now unneeded "fsl,ls1021a" check.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/soc/imx/soc-imx.c

@@ -40,9 +40,6 @@ static int __init imx_soc_device_init(void)
 	if (!__mxc_cpu_type)
 		return 0;
 
-	if (of_machine_is_compatible("fsl,ls1021a"))
-		return 0;
-
 	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 	if (!soc_dev_attr)
 		return -ENOMEM;