arm64: dts: rockchip: remove the abuse of keep-power-in-suspend

It was invented for sdio only, and should not be used for sdmmc
or emmc. Remove it.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts

@@ -116,7 +116,6 @@ &emmc {
 	cap-mmc-highspeed;
 	clock-frequency = <150000000>;
 	disable-wp;
-	keep-power-in-suspend;
 	non-removable;
 	num-slots = <1>;
 	vmmc-supply = <&vcc_io>;

arch/arm64/boot/dts/rockchip/rk3368-orion-r68-meta.dts

@@ -199,7 +199,6 @@ &emmc {
 	bus-width = <8>;
 	cap-mmc-highspeed;
 	disable-wp;
-	keep-power-in-suspend;
 	mmc-pwrseq = <&emmc_pwrseq>;
 	mmc-hs200-1_2v;
 	mmc-hs200-1_8v;
@@ -348,7 +347,6 @@ &sdmmc {
 	clock-freq-min-max = <400000 50000000>;
 	cap-sd-highspeed;
 	card-detect-delay = <200>;
-	keep-power-in-suspend;
 	num-slots = <1>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_cd &sdmmc_bus4>;