rockchip: rk3588: Sync sdmmc node from linux-next

rockchip: rk3588: Sync sdmmc node from linux-next

Sync the sdmmc node from linux-next, include required nodes in SPL and
imply Kconfig options required for functional sdmmc clk in SPL and
U-Boot proper.

This make it possible for both SPL and U-Boot proper to configure sdmmc
clocks. In SPL, before TF-A is loaded, scru regs is configured, in
U-Boot proper a SCMI message is sent to TF-A.

Fixes: 7a5a88433cf0 ("ARM: dts: rockchip: rk3588s-u-boot: Add sdmmc node")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>