ec/lenovo/h8: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: I3db9487c46b29510e59ec5c019d022f5cbaff354
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26068
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

src/ec/lenovo/h8/h8.c

@@ -176,7 +176,7 @@ static void h8_smbios_strings(struct device *dev, struct smbios_type11 *t)
 }
 #endif
 
-static void h8_init(device_t dev)
+static void h8_init(struct device *dev)
 {
 	pc_keyboard_init(NO_AUX_DEVICE);
 }