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/i2c/designware/dw_i2c.c

@@ -805,7 +805,7 @@ void dw_i2c_dev_init(struct device *dev)
  * Generate I2C timing information into the SSDT for the OS driver to consume,
  * optionally applying override values provided by the caller.
  */
-void dw_i2c_acpi_fill_ssdt(struct device *dev)
+void dw_i2c_acpi_fill_ssdt(const struct device *dev)
 {
 	const struct dw_i2c_bus_config *bcfg;
 	uintptr_t dw_i2c_addr;