arm64: dts: mt7622: drop r_smpl property from mmc node

This property is not defined in binding and driver.

Fixes: 2c002a30 ("arm64: dts: mt7622: add mmc related device nodes")
Fixes: 0b6286dd ("arm64: dts: mt7622: add bananapi BPI-R64 board")
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221025132953.81286-6-linux@fw-web.deSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts

@@ -235,7 +235,6 @@ &mmc1 {
 	bus-width = <4>;
 	max-frequency = <50000000>;
 	cap-sd-highspeed;
-	r_smpl = <1>;
 	cd-gpios = <&pio 81 GPIO_ACTIVE_LOW>;
 	vmmc-supply = <&reg_3p3v>;
 	vqmmc-supply = <&reg_3p3v>;

arch/arm64/boot/dts/mediatek/mt7622-rfb1.dts

@@ -208,7 +208,6 @@ &mmc1 {
 	bus-width = <4>;
 	max-frequency = <50000000>;
 	cap-sd-highspeed;
-	r_smpl = <1>;
 	cd-gpios = <&pio 81 GPIO_ACTIVE_LOW>;
 	vmmc-supply = <&reg_3p3v>;
 	vqmmc-supply = <&reg_3p3v>;