MIPS: OCTEON: cavium_octeon_defconfig: enable all OCTEON SoC drivers

Some drivers for SoC provided functionality are missing.
Enable to those in defconfig to provide better build/testing coverage.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12750/


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