MIPS: Octeon: Add fw_init_cmdline() for Cavium platforms.

Add platform-specific kernel command line processing for Octeon.

Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14599/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>