Defines starting with `i' in bsd/dev

• I82077_FIFO_SIZE bsd/dev/fd_extern.h:377
• INTCODE_ABNORMAL bsd/dev/fd_extern.h:547
• INTCODE_COMPLETE bsd/dev/fd_extern.h:546
• INTCODE_INVALID bsd/dev/fd_extern.h:548
• INTCODE_POLL_TERM bsd/dev/fd_extern.h:549