In mt8192 SoC, mmc driver dose not use the MSDC module to control
clock. It will read/write register to enable/disable clock. Also
there is no other device of mt8192 using MSDC controller.
We add mmc nodes for mt8192 SoC and remove the clock-controller in
dts for avoid a duplicate unit-address(11f60000) warning.
Signed-off-by: Allen-KH Cheng <allen-kh.cheng@xxxxxxxxxxxx>