intel_memory_region_by_type
mr = intel_memory_region_by_type(to_i915(dev), mem_type);
mr = intel_memory_region_by_type(i915, INTEL_MEMORY_SYSTEM);
intel_memory_region_by_type(i915, INTEL_MEMORY_SYSTEM);
mem = intel_memory_region_by_type(i915, mem_type);
intel_memory_region_by_type(struct drm_i915_private *i915,