nb/intel/haswell: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: I10fb736a7406a6571dffce883fb82c2711526762
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26196
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
diff --git a/src/northbridge/intel/haswell/haswell.h b/src/northbridge/intel/haswell/haswell.h
index 5f1530a..d8868a1 100644
--- a/src/northbridge/intel/haswell/haswell.h
+++ b/src/northbridge/intel/haswell/haswell.h
@@ -234,7 +234,7 @@
 #include <device/device.h>
 
 struct acpi_rsdp;
-unsigned long northbridge_write_acpi_tables(device_t device,
+unsigned long northbridge_write_acpi_tables(struct device *device,
 		unsigned long start, struct acpi_rsdp *rsdp);
 #endif