mb/lenovo/x200: Fix boot-time docking state

The X200 would undock itself when waking up from S3, requiring a
physical reconnection before the dock would work again.

Similar to 4611ad8, this reintroduces h8_mb_init() for the X200. A hook
function h8_mb_init() will be called at the end of h8_enable(), in place
of the ancient h8_mainboard_init_dock().

This should fix the regression the X201 and T410 also suffered from for
the X200.

Change-Id: Icb6dd145e56b90e0e04133810c5e9ac7b641ad68
Signed-off-by: Kevin Keijzer <kevin@quietlife.nl>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51123
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/lenovo/x200/mainboard.c

@@ -17,8 +17,6 @@ static void mainboard_enable(struct device *dev)
 					GMA_INT15_BOOT_DISPLAY_DEFAULT, 2);
 
 	dev->ops->acpi_fill_ssdt = fill_ssdt;
-	if (CONFIG(BOARD_LENOVO_X200))
-		init_dock();
 }
 
 struct chip_operations mainboard_ops = {

src/mainboard/lenovo/x200/variants/x200/dock.c

@@ -8,13 +8,14 @@
 
 #include "../../dock.h"
 
-void init_dock(void)
+void h8_mb_init(void)
 {
 	if (dock_present()) {
 		printk(BIOS_DEBUG, "dock is connected\n");
 		dock_connect();
-	} else
+	} else {
 		printk(BIOS_DEBUG, "dock is not connected\n");
+	}
 }
 
 void dock_connect(void)