XE_ENGINE_CLASS_OTHER was missing from the str conversion. Add it and
remove the default handling so it's protected by -Wswitch.
Currently the only user is xe_hw_engine_class_sysfs_init(), which
already skips XE_ENGINE_CLASS_OTHER, so there's no change in behavior.

Reviewed-by: Nirmoy Das <nirmoy....@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demar...@intel.com>
---
 drivers/gpu/drm/xe/xe_hw_engine.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c 
b/drivers/gpu/drm/xe/xe_hw_engine.c
index b71e90c555fa..942fca8f1eb9 100644
--- a/drivers/gpu/drm/xe/xe_hw_engine.c
+++ b/drivers/gpu/drm/xe/xe_hw_engine.c
@@ -1111,9 +1111,13 @@ const char *xe_hw_engine_class_to_str(enum 
xe_engine_class class)
                return "vecs";
        case XE_ENGINE_CLASS_COPY:
                return "bcs";
+       case XE_ENGINE_CLASS_OTHER:
+               return "other";
        case XE_ENGINE_CLASS_COMPUTE:
                return "ccs";
-       default:
-               return NULL;
+       case XE_ENGINE_CLASS_MAX:
+               break;
        }
+
+       return NULL;
 }
-- 
2.43.0

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