arm64: dts: rockchip: remove redundant cd-gpios from rk3588 sdmmc nodes

The sdmmc node already have a "&sdmmc_det" for pinctrl which switch the
GPIO0A4 to sdmmc detect function, no need to define a separate "cd-gpios".

RK3588 has force_jtage feature which is enable JTAG function via sdmmc
pins automatically when there is no SD card insert, this feature will
need the GPIO0A4 works in sdmmc_det function like other mmc signal instead
of GPIO function, or else the force_jtag can not auto be disabled when
SD card insert.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Link: https://lore.kernel.org/r/20240201034621.1970279-1-kever.yang@rock-chips.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>