PATCH: change pa scheduling default to 7100LC

[Jeffrey A Law]

  In message < 36D7042B.EF3B721F@americasm01.nt.com >you write:
  > This patch changes the default to 7100LC since the scheduling for this
  > chip works now.
  > 
  > Changelog entry:
  > 
  > Fri Feb 26 15:28:06 EST 1999  Jerry Quinn <jquinn@nortelnetworks.com>
  > 
  > 	* gcc/config/pa/pa.c (override_options): Change default to 7100LC
Thanks!  Installed.

Interested in making an option for "8000"/PROCESSOR_8000?  I think the
only things you need to do are add it to override_options, the cpu
attribute in pa.md and invoke.texi.

Initially it doesn't need to do anything other than set pa_cpu and
pa_cpu_string.  Once we have the option, we can start doing some code
generation tuning (like disabling fmpyadd/fmpysub when scheduling for
a PA8000 class machine.

Thanks!
jeff