device: Constify struct device * parameter to write_acpi_tables

.write_acpi_tables() should not be updating the device structure. This
change makes the struct device * argument to it as const.

Change-Id: I50d013e83a404e0a0e3837ca16fa75c7eaa0e14a
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40701
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/intel/skylake/acpi.c

@@ -588,7 +588,7 @@ static unsigned long acpi_fill_dmar(unsigned long current)
 	return current;
 }
 
-unsigned long northbridge_write_acpi_tables(struct device *const dev,
+unsigned long northbridge_write_acpi_tables(const struct device *const dev,
 					    unsigned long current,
 					    struct acpi_rsdp *const rsdp)
 {
@@ -630,7 +630,7 @@ unsigned long acpi_madt_irq_overrides(unsigned long current)
 	return current;
 }
 
-unsigned long southbridge_write_acpi_tables(struct device *device,
+unsigned long southbridge_write_acpi_tables(const struct device *device,
 					     unsigned long current,
 					     struct acpi_rsdp *rsdp)
 {

src/soc/intel/skylake/graphics.c

@@ -147,7 +147,7 @@ static void update_igd_opregion(igd_opregion_t *opregion)
 	/* FIXME: Add platform specific mailbox initialization */
 }
 
-uintptr_t graphics_soc_write_acpi_opregion(struct device *device,
+uintptr_t graphics_soc_write_acpi_opregion(const struct device *device,
 		uintptr_t current, struct acpi_rsdp *rsdp)
 {
 	igd_opregion_t *opregion;

src/soc/intel/skylake/include/soc/acpi.h

@@ -17,9 +17,9 @@ void acpi_fill_in_fadt(acpi_fadt_t *fadt);
 unsigned long acpi_madt_irq_overrides(unsigned long current);
 void acpi_mainboard_gnvs(global_nvs_t *gnvs);
 void southbridge_inject_dsdt(struct device *device);
-unsigned long southbridge_write_acpi_tables(struct device *device,
+unsigned long southbridge_write_acpi_tables(const struct device *device,
 	unsigned long current, struct acpi_rsdp *rsdp);
-unsigned long northbridge_write_acpi_tables(struct device *,
+unsigned long northbridge_write_acpi_tables(const struct device *,
 	unsigned long current, struct acpi_rsdp *);
 
 #endif /* _SOC_ACPI_H_ */