sb/intel/i82870: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: I751b72733de2e3bf3aebd1bc85dc83ec1c406faa
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26258
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/southbridge/intel/i82870/pcibridge.c

@@ -6,7 +6,7 @@
 #include <pc80/mc146818rtc.h>
 #include "82870.h"
 
-static void p64h2_pcix_init(device_t dev)
+static void p64h2_pcix_init(struct device *dev)
 {
 	u32 dword;
 	u8 byte;