MIPS: Alchemy: Include Au1100 in PM code.

The current code forgets the Au1100 when looking for the correct method to
suspend the chip.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2675/


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