Macros starting with `d' in bsd/kern

• diff bsd/kern/tty.c:1619
• dkminor bsd/kern/subr_disk.c:173
• dkpart bsd/kern/subr_disk.c:172
• dkunit bsd/kern/subr_disk.c:171
• dprintf bsd/kern/bsd_init.c:219
• dtosf bsd/kern/uipc_syscalls.c:1545