probe routines return size of unibus dev regs to reserve space

SCCS-vsn: sys/vax/uba/tm.c 4.50
SCCS-vsn: sys/vax/uba/ut.c 4.14
SCCS-vsn: sys/vax/uba/dz.c 4.39
SCCS-vsn: sys/vax/uba/ts.c 4.25
SCCS-vsn: sys/vax/uba/vp.c 4.15
SCCS-vsn: sys/vax/uba/dh.c 4.46
SCCS-vsn: sys/vax/uba/ct.c 4.8
SCCS-vsn: sys/vax/uba/dn.c 4.5
SCCS-vsn: sys/vax/uba/uda.c 4.6
SCCS-vsn: sys/vax/uba/lp.c 4.26
SCCS-vsn: sys/vax/uba/dmf.c 4.4
SCCS-vsn: sys/vax/uba/lpa.c 4.2
SCCS-vsn: sys/vax/uba/idc.c 4.2
SCCS-vsn: sys/vax/uba/up.c 4.56
SCCS-vsn: sys/vax/uba/rk.c 4.42
SCCS-vsn: sys/vax/uba/ad.c 4.2
SCCS-vsn: sys/vax/uba/ps.c 4.2