mips64: extend the test with new cases for Cavium SEQI and SNEI

Extend the test to introduce cases for SEQI and SNEI when immediate is
equal to the content of the GPR rs. Minor code style changes added.

Patch by Maran Pakkirisamy.

Related issue - BZ #341997.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15043 a5019735-40e9-0310-863c-91ae7b9d1cf9
2 files changed