dt-bindings: mmc: rockchip-dw-mshc: Add support for rk3562

dt-bindings: mmc: rockchip-dw-mshc: Add support for rk3562

The dw-mshc core on Rockchip's RK3562 is the same as the one already
included in RK3288. Extend the binding accordingly to allow

	compatible = "rockchip,rk3562-dw-mshc", "rockchip,rk3288-dw-mshc";

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250227111913.2344207-4-kever.yang@rock-chips.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>