[RISCV] Define getSetCCResultType for setting vector setCC type

To avoid trigger "No default SetCC type for vectors!" Assertion

Differential Revision: https://reviews.llvm.org/D42675

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@324054 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed