Fix fs support ifdefs.  Add tftp support.  Add physical and virtual watchpoint support for debugging (under LOADER_DEBUG).  Claim the physical and virtual addresses used to map the kernel from the prom; we map it ourselves behind the scenes though.  Add a reboot command.
Fix fs support ifdefs.  Add tftp support.  Add physical and virtual
watchpoint support for debugging (under LOADER_DEBUG).  Claim the
physical and virtual addresses used to map the kernel from the prom;
we map it ourselves behind the scenes though.  Add a reboot command.

Submitted by:	tmm

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