[mips][msa] Rename main check prefix to 'ALL' in basic operations tests. NFC

Summary:
The majority of the checks are subtarget independent. The few that aren't
will be corrected shortly.

Reviewers: vkalintiris

Reviewed By: vkalintiris

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D9340


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236220 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed