The Designware IP integrated in TH1520 SoC requires extra clock
configuration to operate correctly. The Linux kernel's T-Head DWMAC glue
driver is ported and adapted to U-Boot's API.
Signed-off-by: Yao Zi <ziyao@disroot.org>
Acked-by: Leo Yu-Chi Liang <ycliang@andestech.com>