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/include/device/device.h

@@ -50,7 +50,7 @@ struct device_operations {
 #if CONFIG(HAVE_ACPI_TABLES)
 	unsigned long (*write_acpi_tables)(const struct device *dev,
 		unsigned long start, struct acpi_rsdp *rsdp);
-	void (*acpi_fill_ssdt)(struct device *dev);
+	void (*acpi_fill_ssdt)(const struct device *dev);
 	void (*acpi_inject_dsdt)(struct device *dev);
 	const char *(*acpi_name)(const struct device *dev);
 	/* Returns the optional _HID (Hardware ID) */

src/include/device/pci_rom.h

@@ -43,7 +43,7 @@ pci_rom_write_acpi_tables(const struct device *device,
 						  unsigned long current,
 						  struct acpi_rsdp *rsdp);
 
-void pci_rom_ssdt(struct device *device);
+void pci_rom_ssdt(const struct device *device);
 
 void map_oprom_vendev_rev(u32 *vendev, u8 *rev);
 u32 map_oprom_vendev(u32 vendev);