board: rockchip: Add Indiedroid Nova

The Indiedroid Nova is a Rockchip RK3588S based SBC from Indiedroid.

Specifications:

    Rockchip RK3588S SoC
    4x ARM Cortex-A76, 4x ARM Cortex-A55
    4/8/16GB memory LPDDR4x
    Mali G610MC4 GPU
    Optional eMMC
    2x USB 2.0, 2x USB 3.0, 1x USB 3.0 C port with DP Alt
    1x MIPI-CSI Port (4-lane or 2x 2-lane)
    1x MIPI-DSI 4-lane connector
    1x Micro HDMI 2.1 output, 1x DP 1.4 output
    Gigabit Ethernet
    Realtek RTL8821CS WiFi
    4 pin debug UART connector
    40 pin GPIO header
    Size: 85mm x 56mm (Raspberry Pi Form Factor)

Kernel commit:
3900160e164b ("arm64: dts: rockchip: Add Indiedroid Nova board")

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/doc/board/rockchip/rockchip.rst b/doc/board/rockchip/rockchip.rst
index 924a8d0..cfbf641 100644
--- a/doc/board/rockchip/rockchip.rst
+++ b/doc/board/rockchip/rockchip.rst
@@ -124,6 +124,7 @@
      - Edgeble Neural Compute Module 6B SoM - Neu6b (neu6b-io-rk3588)
      - FriendlyElec NanoPC-T6 (nanopc-t6-rk3588)
      - Generic RK3588S/RK3588 (generic-rk3588)
+     - Indiedroid Nova (nova-rk3588s)
      - Pine64 QuartzPro64 (quartzpro64-rk3588)
      - Radxa ROCK 5A (rock5a-rk3588s)
      - Radxa ROCK 5B (rock5b-rk3588)