device: Constify struct device * parameter to acpi_fill_ssdt()

.acpi_fill_ssdt() does not need to modify the device structure. This
change makes the struct device * parameter to acpi_fill_ssdt() as
const.

Change-Id: I110f4c67c3b6671c9ac0a82e02609902a8ee5d5c
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40710
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/wifi/generic_wifi.h

@@ -22,7 +22,7 @@ struct generic_wifi_config {
  * This function implements common device operation to help fill ACPI SSDT
  * table for WiFi controller.
  */
-void generic_wifi_fill_ssdt(struct device *dev,
+void generic_wifi_fill_ssdt(const struct device *dev,
 			    const struct generic_wifi_config *config);
 
 /**