pa.md (non-[cf]branch define_delay): Use a single delay description for the delay slots in "branch"...

	* pa.md	(non-[cf]branch define_delay): Use a single delay description
	for the delay slots in "branch", "call", and "milli" insns.
	(fbranch define_delay): fbranches have a single delay slot which
	may be nullified when the branch is taken (regardless of direction
	or distance to the target.)
	(in_branch_delay attribute): Disallow fbranch insns explicitly.
	(floating point branches): Use "fbranch" attribute for these insns.
	Update output template to properly handle nullification.

From-SVN: r2107