Add basic support for Atheros AR5312/AR2312 SoCs: registers definition
file and initial setup code.
Signed-off-by: NSergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/8238/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>