[X86] Correct the value AdSizeX in X86II enum. NFC

Should be NFC since nothing used the enum value. The instruction descriptions are generated from tablegen which had the correct value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328398 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed