fix error: 'kIOMasterPortDefault' is unavailable: not available on iOS

[user1121114685]

test on m1 cpu ,macos and ios build

[shoenig]

Thanks @user1121114685! It does seem like both of kIOMainPortDefault and kIOMasterPortDefault are just NULL. In fact the Apple docs describe it as much in https://developer.apple.com/documentation/iokit/kiomasterportdefault?language=objc

If we just switch to MACH_PORT_NULL as you have here, I think we can just eliminate this versioning macro. Do you mind adding a commit to clean that up?

[user1121114685]

We should wait for the author's results, he has more to consider than we do