to locore to process the @fptr relocations in the dynamic executable.
* Don't initialise the timer until *after* we install the timecounter to
avoid a race between timecounter initialisation and hardclock.
* Tidy up bootinfo somewhat including adding sanity checks for when the
kernel is loaded without a recognisable bootinfo.
* Switch to proc0's stack and backing store before calling ia64_init
so that we don't rely on the loader's stack at all.
* Change kernel entry point name from locorestart to __start.
not work on any real hardware (or fully work on any simulator). Much more
needs to happen before this is actually functional but its nice to see
the FreeBSD copyright message appear in the ia64 simulator.
