drm/xe: Promote xe_hw_engine_class_to_str()

Move it out of the sysfs compilation unit so it can be re-used in other
places.
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Oak Zeng <oak.zeng@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240517204310.88854-2-lucas.demarchi@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/xe_hw_engine.c

@@ -1099,3 +1099,21 @@ bool xe_hw_engine_is_reserved(struct xe_hw_engine *hwe)
 	return xe->info.has_usm && hwe->class == XE_ENGINE_CLASS_COPY &&
 		hwe->instance == gt->usm.reserved_bcs_instance;
 }
+
+const char *xe_hw_engine_class_to_str(enum xe_engine_class class)
+{
+	switch (class) {
+	case XE_ENGINE_CLASS_RENDER:
+		return "rcs";
+	case XE_ENGINE_CLASS_VIDEO_DECODE:
+		return "vcs";
+	case XE_ENGINE_CLASS_VIDEO_ENHANCE:
+		return "vecs";
+	case XE_ENGINE_CLASS_COPY:
+		return "bcs";
+	case XE_ENGINE_CLASS_COMPUTE:
+		return "ccs";
+	default:
+		return NULL;
+	}
+}

drivers/gpu/drm/xe/xe_hw_engine.h

@@ -67,4 +67,6 @@ static inline bool xe_hw_engine_is_valid(struct xe_hw_engine *hwe)
 	return hwe->name;
 }
 
+const char *xe_hw_engine_class_to_str(enum xe_engine_class class);
+
 #endif

drivers/gpu/drm/xe/xe_hw_engine_class_sysfs.c

@@ -618,24 +618,6 @@ static void hw_engine_class_sysfs_fini(struct drm_device *drm, void *arg)
 	kobject_put(kobj);
 }
 
-static const char *xe_hw_engine_class_to_str(enum xe_engine_class class)
-{
-	switch (class) {
-	case XE_ENGINE_CLASS_RENDER:
-		return "rcs";
-	case XE_ENGINE_CLASS_VIDEO_DECODE:
-		return "vcs";
-	case XE_ENGINE_CLASS_VIDEO_ENHANCE:
-		return "vecs";
-	case XE_ENGINE_CLASS_COPY:
-		return "bcs";
-	case XE_ENGINE_CLASS_COMPUTE:
-		return "ccs";
-	default:
-		return NULL;
-	}
-}
-
 /**
  * xe_hw_engine_class_sysfs_init - Init HW engine classes on GT.
  * @gt: Xe GT.