soc/intel: Constify struct device * parameter to intel_igd_get_controller_info

intel_igd_get_controller_info() does not need to modify the device
structure. Hence, this change makes the struct device * parameter to
intel_igd_get_controller_info() as const.

Change-Id: Ic044a80e3e2c45af6824a23f3cd0b08b94c0f279
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40709
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/common/block/graphics/graphics.c

@@ -34,7 +34,7 @@ __weak void graphics_soc_init(struct device *dev)
 }
 
 __weak const struct i915_gpu_controller_info *
-intel_igd_get_controller_info(struct device *device)
+intel_igd_get_controller_info(const struct device *device)
 {
 	return NULL;
 }

src/soc/intel/common/block/include/intelblocks/graphics.h

@@ -35,7 +35,7 @@ uintptr_t graphics_soc_write_acpi_opregion(const struct device *device,
 
 /* i915 controller info for ACPI backlight controls */
 const struct i915_gpu_controller_info *
-intel_igd_get_controller_info(struct device *device);
+intel_igd_get_controller_info(const struct device *device);
 
 /* Graphics MMIO register read/write APIs */
 uint32_t graphics_gtt_read(unsigned long reg);

src/soc/intel/skylake/graphics.c

@@ -177,7 +177,7 @@ uintptr_t graphics_soc_write_acpi_opregion(const struct device *device,
 }
 
 const struct i915_gpu_controller_info *
-intel_igd_get_controller_info(struct device *device)
+intel_igd_get_controller_info(const struct device *device)
 {
 	struct soc_intel_skylake_config *chip = device->chip_info;
 	return &chip->gfx;