Defines starting with `s' in iokit/IOKit

• sub_iokit_common iokit/IOKit/IOReturn.h:47
• sub_iokit_firewire iokit/IOKit/IOReturn.h:49
• sub_iokit_reserved iokit/IOKit/IOReturn.h:50
• sub_iokit_usb iokit/IOKit/IOReturn.h:48
• sys_iokit iokit/IOKit/IOReturn.h:45