[VectorLegalizer] Remove EVT::getSizeInBits code duplications. NFCI.

We were calling SVT.getSizeInBits() several times in a row - just call it once and reuse the result.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287556 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed