drm/i915: move I915_COLOR_UNEVICTABLE to i915_gem_gtt.h

Declutter i915_drv.h.

Signed-off-by: Jani Nikula <[e-mail]>
Acked-by: Tvrtko Ursulin <[e-mail]>
Acked-by: Nirmoy Das <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/i915_drv.h

···
 struct drm_i915_clock_gating_funcs;
 struct vlv_s0ix_state;
 
-#define I915_COLOR_UNEVICTABLE (-1) /* a non-vma sharing the address space */
-
 #define GEM_QUIRK_PIN_SWIZZLED_PAGES	BIT(0)
 
 /* Data Stolen Memory (DSM) aka "i915 stolen memory" */

drivers/gpu/drm/i915/i915_gem_gtt.h

···
 struct i915_address_space;
 struct i915_gem_ww_ctx;
 
+#define I915_COLOR_UNEVICTABLE (-1) /* a non-vma sharing the address space */
+
 int __must_check i915_gem_gtt_prepare_pages(struct drm_i915_gem_object *obj,
 					    struct sg_table *pages);
 void i915_gem_gtt_finish_pages(struct drm_i915_gem_object *obj,