MIPS: OCTEON: Add little-endian support to asm/octeon/octeon.h

MIPS: OCTEON: Add little-endian support to asm/octeon/octeon.h

Also update union octeon_cvmemctl with new OCTEON II fields.

[aleksey.makarov@auriga.com: use __BITFIELD_FIELD]

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8940/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>