[RESEND PATCH v2 06/14] arm64: dts: meson-gx: fix mhu compatible

This fixes the following DT schemas check errors: meson-gxbb-nanopi-k2.dt.yaml: mailbox@404: compatible:0: 'amlogic,meson-gx-mhu' is not one of ['amlogic,meson-gxbb-mhu'] meson-gxl-s805x-libretech-ac.dt.yaml: mailbox@404: compatible:0: 'amlogic,meson-gx-mhu' is not one of

[PATCH v2 06/14] arm64: dts: meson-gx: fix mhu compatible

This fixes the following DT schemas check errors: meson-gxbb-nanopi-k2.dt.yaml: mailbox@404: compatible:0: 'amlogic,meson-gx-mhu' is not one of ['amlogic,meson-gxbb-mhu'] meson-gxl-s805x-libretech-ac.dt.yaml: mailbox@404: compatible:0: 'amlogic,meson-gx-mhu' is not one of