ntdll: Change zero_bits parameter type to ULONG_PTR for NtMapViewOfSection and NtAllocateVirtualMemory.

It can be a pointer mask, eventually 64bit, and ULONG_PTR is what can be
found in several documentation of these functions.
Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>