[Hexagon] Use ArrayRef to avoid needing to calculate an array size. Interestingly the original code may have had a bug because it was passing the byte size of a uint16_t array instead of the number of entries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254382 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed