From: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>
This property is not defined in binding and driver.
Fixes: 2c002a3049f7 ("arm64: dts: mt7622: add mmc related device nodes")
Fixes: 0b6286dd96c0 ("arm64: dts: mt7622: add bananapi BPI-R64 board")
Signed-off-by: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>