MIPS: add nmi_enter() + nmi_exit() to nmi_exception_handler()
MIPS: add nmi_enter() + nmi_exit() to nmi_exception_handler()

We need to enter NMI context when NMI interrupt fires.

Signed-off-by: Petri Gynther <7e73446017073c108d9d160035602f65b591aade@google.com>
Cc: 562397917b9a8bf316569a848858b12fb417723f@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11323/
Signed-off-by: Ralf Baechle <92f48d309cda194c8eda36aa8f9ae28c488fa208@linux-mips.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs