board: add support for LicheeRV Nano

The LicheeRV Nano is a small SBC using the Sophgo SG2002 RISCV SoC.

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

include/configs/licheerv_nano.h

@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2024, Thomas Bonnefille <thomas.bonnefille@bootlin.com>
+ *
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#include <config_distro_bootcmd.h>
+
+#define BOOT_TARGET_DEVICES(func) \
+	func(MMC, mmc, 0)
+
+#define CFG_SYS_SDRAM_BASE         0x80000000
+
+#define CFG_EXTRA_ENV_SETTINGS  "consoledev=ttyS0\0" \
+								"baudrate=115200\0" \
+								"fdt_addr_r=0x82000000\0" \
+								"kernel_addr_r=0x81000000\0" \
+								"scriptaddr=0x80c00000\0" \
+								BOOTENV
+
+#endif /* __CONFIG_H */