move contents to already existing platform.c file.
Signed-off-by: NManuel Lauss <manuel.lauss@googlemail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3287/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>