arm64: dts: rockchip: Add clock generators for RK3528 SoC

arm64: dts: rockchip: Add clock generators for RK3528 SoC

Add dt node for RK3528 clock and reset unit. Clock "gmac0_clk" is
generated by internal Ethernet phy, a fixed clock node is added as a
placeholder to avoid orphans.

Signed-off-by: Yao Zi <ziyao@disroot.org>
Link: https://lore.kernel.org/r/20250217061142.38480-9-ziyao@disroot.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
[ upstream commit: 858cdcdd11cf9913756297d3869e4de0f01329ea ]

(cherry picked from commit 60741472b42e92d2393327cb70669ab90e3b382f)
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>