platform: generic: sophgo: add mango soc support

The mango cpu of sophgo is a 64 cores C920 CPU. The board with mango can
have at most two sockets. The CPU have the following features:

 1) support RV64GCV
 2) one seperate timer each cluster
 3) T-HEAD pmu device

Signed-off-by: Inochi Amaoto <inochiama@outlook.com>

lib/utils/ipi/fdt_ipi_mswi.c

@@ -57,6 +57,7 @@ static const struct fdt_match ipi_mswi_match[] = {
 	{ .compatible = "riscv,clint0", .data = &clint_offset },
 	{ .compatible = "sifive,clint0", .data = &clint_offset },
 	{ .compatible = "thead,c900-clint", .data = &clint_offset },
+	{ .compatible = "thead,c900-clint-mswi", .data = &clint_offset },
 	{ .compatible = "riscv,aclint-mswi" },
 	{ },
 };