drm/radeon: add helper function to support golden registers

Golden registers are arrays of register settings from the
hw team that need to be initialized at asic startup.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 856a67d..d6c8cba 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1946,6 +1946,9 @@
 extern int radeon_resume_kms(struct drm_device *dev);
 extern int radeon_suspend_kms(struct drm_device *dev, pm_message_t state);
 extern void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size);
+extern void radeon_program_register_sequence(struct radeon_device *rdev,
+					     const u32 *registers,
+					     const u32 array_size);
 
 /*
  * vm