spi: dt-bindings: Add rk3562 support

Add rockchip,rk3562-spi compatible for rk3562.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20250227111913.2344207-8-kever.yang@rock-chips.com


Signed-off-by: Mark Brown <broonie@kernel.org>