board: rockchip: Add support for rk3588 based Cool Pi CM5 EVB

Cool Pi CM5 EVB works as a mother board connect with CM5.

CM5 Specification:
- Rockchip RK3588
- LPDDR4 2/4/8/16 GB
- TF scard slot
- eMMC 8/32/64/128 GB module
- SPI Nor 8MB
- Gigabit ethernet x 1 with PHY YT8531
- Gigabit ethernet x 1 drived by PCIE with YT6801S

CM5 EVB Specification:
- HDMI Type A out x 2
- HDMI Type D in x 1
- USB 2.0 Host x 2
- USB 3.0 OTG x 1
- USB 3.0 Host x 1
- PCIE M.2 E Key for Wireless connection
- PCIE M.2 M Key for NVME connection
- 40 pin header

The dts is from linux-6.8 rc1.

Signed-off-by: Andy Yan <andyshrk@163.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

[0]https://patchwork.kernel.org/project/linux-rockchip/patch/2450634.jE0xQCEvom@phil/
diff --git a/board/rockchip/evb_rk3588/MAINTAINERS b/board/rockchip/evb_rk3588/MAINTAINERS
index 1604229..8ab58e3 100644
--- a/board/rockchip/evb_rk3588/MAINTAINERS
+++ b/board/rockchip/evb_rk3588/MAINTAINERS
@@ -5,6 +5,14 @@
 F:	arch/arm/dts/rk3588s-coolpi-4b.dts
 F:	arch/arm/dts/rk3588s-coolpi-u-boot.dtsi
 
+COOLPI-CM5-EVB-RK3588
+M:	Andy Yan <andyshrk@163.com>
+S:	Maintained
+F:	configs/coolpi-cm5-evb-rk3588_defconfig
+F:	arch/arm/dts/rk3588-coolpi-cm5.dtsi
+F:	arch/arm/dts/rk3588-coolpi-cm5-evb.dts
+F:	arch/arm/dts/rk3588-coolpi-cm5-evb-u-boot.dtsi
+
 EVB-RK3588
 M:	Kever Yang <kever.yang@rock-chips.com>
 S:	Maintained