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>

src/southbridge/intel/i82801gx/pcie.c

@@ -89,8 +89,8 @@ static void pci_init(struct device *dev)
 	pci_write_config16(dev, 0x1e, reg16);
 }
 
-static void pcie_set_subsystem(device_t dev, unsigned int vendor,
-			unsigned int device)
+static void pcie_set_subsystem(struct device *dev, unsigned int vendor,
+			       unsigned int device)
 {
 	/* NOTE: This is not the default position! */
 	if (!vendor || !device) {