Defines starting with `r' in osfmk/mach

• READ_LOCK osfmk/mach/etap.h:186
• REALTIME_CLOCK osfmk/mach/clock_types.h:45
• REQUEST_COMMANDS osfmk/mach/kkt_request.h:279
• REQUEST_RECV osfmk/mach/kkt_request.h:278
• REQUEST_SEND osfmk/mach/kkt_request.h:277
• REQUEST_SG osfmk/mach/kkt_request.h:280
• ROSE_F osfmk/mach/boot_info.h:229
• RPC_COW_SIZE osfmk/mach/rpc.h:326
• RPC_DESC_COUNT osfmk/mach/rpc.h:327
• RPC_KBUF_SIZE osfmk/mach/rpc.h:325
• RPC_SIGBUF_SIZE osfmk/mach/rpc.h:214
• RPC_SUBSYSTEM_NULL osfmk/mach/rpc.h:251