[itanium-sched-branch] Patch for less severe requirement for distribution of units to automata

[David Edelsohn]

> The following patch permits more flexibility in distributions of units
> to automata.  It permits to generate smaller automata in some
> cases.

	Thanks for the patch.

	I am getting an error with the NDFA Power4 description:

Check unit distributions to automata...genattrtab: Unit `iu1_power4'
should be placed in one automaton with other units -- possible candidates:
`iu2_power4'

Units iu1_power4 and iu2_power *are* in the same automaton:

(define_cpu_unit "iu1_power4,iu2_power4" "power4iu")

	We'll have to investigate this more after the holidays.

Thanks, David