[Hexagon] Fixes and updates to the selection patterns

- Add some missing patterns.
- Use C4_cmplte in branch patterns.
- Fix signedness of immediate operand in M2_accii.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305085 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed