MIPS: Implement task_user_regset_view.
MIPS: Implement task_user_regset_view.

There are no users yet of task_user_regset_view. yet; users will be
implemented rsp activated in subsequent commits.

Signed-off-by: Ralf Baechle <92f48d309cda194c8eda36aa8f9ae28c488fa208@linux-mips.org>

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