update from Mike Hibler for new VM and other machine support

update from Mike Hibler for new VM and other machine support

SCCS-vsn: sys/hp300/dev/dcm.c 7.9
SCCS-vsn: sys/hp300/dev/dma.c 7.2
SCCS-vsn: sys/hp/dev/grf.c 7.5
SCCS-vsn: sys/hp300/dev/grf_tc.c 7.2
SCCS-vsn: sys/hp/dev/hil.c 7.5
SCCS-vsn: sys/hp300/dev/ite_tc.c 7.2
SCCS-vsn: sys/hp300/dev/rd.c 7.4
SCCS-vsn: sys/hp300/dev/sd.c 7.3
SCCS-vsn: sys/hp300/hp300/clockreg.h 7.2
SCCS-vsn: sys/hp300/hp300/autoconf.c 7.3
SCCS-vsn: sys/hp300/hp300/clock.c 7.3
SCCS-vsn: sys/hp300/hp300/conf.c 7.2
SCCS-vsn: sys/hp300/hp300/genassym.c 7.4
SCCS-vsn: sys/hp300/hp300/mem.c 7.2
SCCS-vsn: sys/hp300/hp300/swapgeneric.c 7.2
SCCS-vsn: sys/hp300/hp300/sys_machdep.c 7.5
SCCS-vsn: sys/hp300/hp300/trap.c 7.8
SCCS-vsn: sys/hp300/hp300/vm_machdep.c 7.6
SCCS-vsn: sys/hp300/hp300/locore.s 7.5
SCCS-vsn: sys/hp300/hp300/machdep.c 7.8
SCCS-vsn: sys/hp/hpux/hpux.h 7.2
SCCS-vsn: sys/hp/hpux/hpux_compat.c 7.10
SCCS-vsn: sys/hp/hpux/hpux_sig.c 7.5