southbridge/intel/i82371eb: transition away from device_t

Replace the use of the old device_t definition inside
southbridge/intel/i82371eb.

Change-Id: Ie15a656c817a2ffe0f44ee3a89659d138a1bf212
Signed-off-by: Antonello Dettori <dev@dettori.io>
Reviewed-on: https://review.coreboot.org/16483
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/southbridge/intel/i82371eb/early_pm.c b/src/southbridge/intel/i82371eb/early_pm.c
index 0605d10..1794393 100644
--- a/src/southbridge/intel/i82371eb/early_pm.c
+++ b/src/southbridge/intel/i82371eb/early_pm.c
@@ -23,7 +23,7 @@
 
 void enable_pm(void)
 {
-	device_t dev;
+	pci_devfn_t dev;
 	u8 reg8;
 	u16 reg16;