ARM: dts: rockchip: remove cap-mmc-highspeed from rk3188-bqedison2qc mmc1 node

The mmc1 pins are used for SDIO with a wifi chip.
The function mmc_sdio_switch_hs() only checks for MMC_CAP_SD_HIGHSPEED and
not for MMC_CAP_MMC_HIGHSPEED, so cap-mmc-highspeed can be removed.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3188-bqedison2qc.dts

@@ -460,7 +460,6 @@ &mmc0 {
 &mmc1 {
 	bus-width = <4>;
 	cap-sd-highspeed;
-	cap-mmc-highspeed;
 	keep-power-in-suspend;
 	mmc-pwrseq = <&sdio_pwrseq>;
 	non-removable;