Clang 12 doesn't consider a function with an inconsistent signature
as matching the intrinsic.

This fixes InterlockedCompareExchange128 with clang 12 in MSVC mode.
Signed-off-by: Martin Storsjo <martin@martin.st>
Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>