fix Xtensa branch alignment code

[Bob Wilson]

This patch fixes a bug in the branch alignment code of the Xtensa GAS port.  The 
code was checking the width of the Xtensa processor's instruction fetch 
interface to see how much alignment is required to avoid a stall for taken 
branches.  This is correct as long as the current section is aligned at least as 
much as the fetch width, but the code was not checking the section alignment. 
Tested with an xtensa-elf target and committed on the mainline.  I will put it 
on the branch, too.


2005-04-05  Sterling Augustine  <sterling@tensilica.com>
	    Bob Wilson  <bob.wilson@acm.org>

	* config/tc-xtensa.c (branch_align_power): New.
	(xtensa_find_unaligned_branch_targets, get_aligned_diff,
	future_alignment_required): Use branch_align_power to check section
	alignment as well as xtensa_fetch_width when aligning branch targets.


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