MIPS: Netlogic: Enable access to more than 64GB

The ELPA bit needs to be set in the PAGEGRAIN register to enable
access to >64GB physical address. Update reset.S to do this from
every hardware thread.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6866/


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