arm64: dts: rockchip: remove broken-cd from sdio0

commit 1ade61c1

 ("arm64: dts: rockchip: remove broken-cd
from emmc and sdio") was intended to remove the abuse of
broken-cd property from mmc. But somehow it forgot to remove
this property from sdio0 node. Let's remove it now.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>