sb/intel/i82801ix: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: Iefef4e72f1012c8a6edbb9e5c94bdc162bed93d0
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26256
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/src/southbridge/intel/i82801ix/thermal.c b/src/southbridge/intel/i82801ix/thermal.c
index 12cf898..5f40d2e 100644
--- a/src/southbridge/intel/i82801ix/thermal.c
+++ b/src/southbridge/intel/i82801ix/thermal.c
@@ -50,7 +50,8 @@
 	pci_write_config32(dev, 0x10, 0);
 }
 
-static void thermal_set_subsystem(device_t dev, unsigned vendor, unsigned device)
+static void thermal_set_subsystem(struct device *dev, unsigned vendor,
+				  unsigned device)
 {
 	if (!vendor || !device) {
 		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,