Add compatible string to support cmdq for MT8189.

Signed-off-by: Xiandong Wang <xiandong.wang@mediatek.com>
---
 .../devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml        | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml b/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
index 73d6db34d64a..f9718b90d36a 100644
--- a/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
+++ b/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
@@ -23,6 +23,7 @@ properties:
           - mediatek,mt8183-gce
           - mediatek,mt8186-gce
           - mediatek,mt8188-gce
+          - mediatek,mt8189-gce
           - mediatek,mt8192-gce
           - mediatek,mt8195-gce
           - mediatek,mt8196-gce
-- 
2.46.0