Sun bug 6811468: pci_device_solx_devfs_probe accesses freed memory

Sun bug 6811468: pci_device_solx_devfs_probe accesses freed memory

di_fini() is being called in pci_device_solx_devfs_probe()
The di_fini (3DEVINFO) man page says "All  handles associated with this
snapshot become invalid after the  call to di_fini()".  But after that,
eight lines down, the subroutine was calling di_prop_lookup_ints with
a handle args.node which was stored from walking the device tree, and
then using the pointers that returned even further down.

Signed-off-by: Alan Coopersmith <alan.coopersmith@sun.com>