lenovo/x60: Move mainboard_enable() code into a mainboard_init()

mainboard_enable() is now modelled after google/parrot where the
enable function only sets dev->ops->init for the root device to
point to a mainboard_init() function, which in turn is called in a
later pass over the device tree to do the actual initialization.

Change-Id: Iaf9187532a1e432b991260201b95dda85cc312c5
Signed-off-by: Peter Stuge <peter@stuge.se>
Reviewed-on: http://review.coreboot.org/3619
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/mainboard/lenovo/x60/mainboard.c

@@ -85,7 +85,7 @@ int get_cst_entries(acpi_cstate_t **entries)
 	return ARRAY_SIZE(cst_entries);
 }
 
-static void mainboard_enable(device_t dev)
+static void mainboard_init(device_t dev)
 {
 	device_t dev0, idedev, sdhci_dev;
 
@@ -133,6 +133,11 @@ static void mainboard_enable(device_t dev)
 	}
 }
 
+static void mainboard_enable(device_t dev)
+{
+	dev->ops->init = mainboard_init;
+}
+
 struct chip_operations mainboard_ops = {
 	.enable_dev = mainboard_enable,
 };