ARM: dts: qcom: remove commented mmc-ddr-1_8v for sdcc3

This property appears to be commented out, so we can remove it
as well.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Link: https://lore.kernel.org/r/20200902165159.7733-2-freifunk@adrianschmutzler.deSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm/boot/dts/qcom-ipq8064.dtsi

@@ -786,7 +786,6 @@ sdcc@12180000 {
 				cap-sd-highspeed;
 				cap-mmc-highspeed;
 				max-frequency   = <192000000>;
-				#mmc-ddr-1_8v;
 				sd-uhs-sdr104;
 				sd-uhs-ddr50;
 				vqmmc-supply = <&vsdcc_fixed>;