riscv: dts: sophgo: Add initial device tree of Sophgo SRD3-10

Sophgo SG2044 SRD3-10 board bases on Sophgo SG2044 SoC.
This board includes 5 uart ports, 5 pcie x8 slots, 1 1G Ethernet port,
1 microSD slot.

Add initial device tree of this board with uart support.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Inochi Amaoto <[email protected]>
Signed-off-by: Chen Wang <[email protected]>
Signed-off-by: Chen Wang <[email protected]>

Author: inochisa

arch/riscv/boot/dts/sophgo/Makefile

@@ -3,3 +3,4 @@ dtb-$(CONFIG_ARCH_SOPHGO) += cv1800b-milkv-duo.dtb
 dtb-$(CONFIG_ARCH_SOPHGO) += cv1812h-huashan-pi.dtb
 dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-licheerv-nano-b.dtb
 dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-milkv-pioneer.dtb
+dtb-$(CONFIG_ARCH_SOPHGO) += sg2044-sophgo-srd3-10.dtb