sb/intel/i82801gx: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: Iccddf3140fd94c2e5a246fe2839573f5dd387147
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26245
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/southbridge/intel/i82801gx/usb.c b/src/southbridge/intel/i82801gx/usb.c
index 2978080..eaa2cf1 100644
--- a/src/southbridge/intel/i82801gx/usb.c
+++ b/src/southbridge/intel/i82801gx/usb.c
@@ -42,8 +42,8 @@
 	printk(BIOS_DEBUG, "done.\n");
 }
 
-static void usb_set_subsystem(device_t dev, unsigned int vendor,
-			unsigned int device)
+static void usb_set_subsystem(struct device *dev, unsigned int vendor,
+			      unsigned int device)
 {
 	if (!vendor || !device) {
 		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,