[TableGen] Remove an assumption about the order of encodings in the MVT::SimpleValueType enum. Instead of assuming the types are sorted by size, scan the typeset arrays to find the smallest/largest type. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254589 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed