No need to duplicate code that is available in the firmware library.
It also give us access to the firmware environment which is needed
to read the initrd address and size.
Signed-off-by: NAlban Bedel <albeu@free.fr>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8353/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>