ARM: Change ArchCheck field to uint64_t

The values in this field are compared against getAvailableFeatures()
which returns an uint64_t. This was causing problems in an internal
branch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254462 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed