riscv: dts: sophgo: add device tree for LicheeRV Nano

Import a slightly modified version of the LicheeRV Nano and SG2002
device trees from the Linux Kernel. The current supported IPs are UART,
MMC, Timer, PLIC and CLINT.

Signed-off-by: Thomas Bonnefille <thomas.bonnefille@bootlin.com>
3 files changed