drm/i915: move i915_cache_level_str() static in i915_debugfs.c

Move the function next to the only user.

Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/dc0901dbe424c21b3e03b875bf5b944b214d1af4.1644507885.git.jani.nikula@intel.com

drivers/gpu/drm/i915/gt/intel_engine_cs.c

@@ -1230,17 +1230,6 @@ void intel_engine_cancel_stop_cs(struct intel_engine_cs *engine)
 	ENGINE_WRITE_FW(engine, RING_MI_MODE, _MASKED_BIT_DISABLE(STOP_RING));
 }
 
-const char *i915_cache_level_str(struct drm_i915_private *i915, int type)
-{
-	switch (type) {
-	case I915_CACHE_NONE: return " uncached";
-	case I915_CACHE_LLC: return HAS_LLC(i915) ? " LLC" : " snooped";
-	case I915_CACHE_L3_LLC: return " L3+LLC";
-	case I915_CACHE_WT: return " WT";
-	default: return "";
-	}
-}
-
 static u32
 read_subslice_reg(const struct intel_engine_cs *engine,
 		  int slice, int subslice, i915_reg_t reg)

drivers/gpu/drm/i915/i915_debugfs.c

@@ -137,6 +137,17 @@ static const char *stringify_vma_type(const struct i915_vma *vma)
 	return "ppgtt";
 }
 
+static const char *i915_cache_level_str(struct drm_i915_private *i915, int type)
+{
+	switch (type) {
+	case I915_CACHE_NONE: return " uncached";
+	case I915_CACHE_LLC: return HAS_LLC(i915) ? " LLC" : " snooped";
+	case I915_CACHE_L3_LLC: return " L3+LLC";
+	case I915_CACHE_WT: return " WT";
+	default: return "";
+	}
+}
+
 void
 i915_debugfs_describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
 {

drivers/gpu/drm/i915/i915_drv.h

@@ -1641,8 +1641,6 @@ static inline bool i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_objec
 		i915_gem_object_is_tiled(obj);
 }
 
-const char *i915_cache_level_str(struct drm_i915_private *i915, int type);
-
 /* intel_device_info.c */
 static inline struct intel_device_info *
 mkwrite_device_info(struct drm_i915_private *dev_priv)