[DRIVER] ata: ahci-imx: register driver at late_initcall

If SATA probes before PCIe, the interface does not come up.
We workaround this issue by registering the driver later, using late_initcall.

drivers/ata/ahci_imx.c

@@ -1688,7 +1688,7 @@ static int __init imx_ahci_init(void)
 	return ret;
 }
 
-device_initcall(imx_ahci_init);
+late_initcall(imx_ahci_init);
 
 MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver");
 MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>");