drivers/xgi/z9s: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: Ia9c705d34b90ad44272a06790fbb1041029ef77d
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26069
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/xgi/z9s/z9s.c

@@ -26,7 +26,7 @@
 #include "../common/xgi_coreboot.h"
 #include "../common/XGIfb.h"
 
-static void xgi_z9s_set_resources(device_t dev)
+static void xgi_z9s_set_resources(struct device *dev)
 {
 	/* Reserve VGA regions */
 	mmio_resource(dev, 3, 0xa0000 >> 10, 0x1ffff >> 10);