[AArch64] Use LL for 64-bit intrinsic arguments

The ACLE states that 64-bit crc32, wsr, rsr and rbit operands are
uint64_t so we should have the clang builtin match this description
- which is what we already do for AArch32.

Differential Revision: https://reviews.llvm.org/D56852

llvm-svn: 351740