mainboard: Get rid of device_t

Use of device_t has been abandoned in ramstage.
Use pci_devfn_t or pnp_devfn_t instead of device_t in romstage.

Change-Id: Ie0ae3972eacc97ae154dad4fafd171aa1f38683a
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26984
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/quark/include/soc/ramstage.h

@@ -24,7 +24,7 @@
 #endif
 #include <soc/QuarkNcSocId.h>
 
-void mainboard_gpio_i2c_init(device_t dev);
+void mainboard_gpio_i2c_init(struct device *dev);
 #if IS_ENABLED(CONFIG_PLATFORM_USES_FSP1_1)
 void fsp_silicon_init(bool s3wake);
 #endif