* config/tc-xtensa.c (xtensa_mark_narrow_branches): Set
is_aligning_branch flag.
(find_address_of_next_align_frag): Limit by xtensa_fetch_width.
(future_alignment_required): Except for frags with is_aligning_branch
flag set, call frag_wane for frags that do not need to be reexamined
for aligning.
(relax_frag_immed): Replace orig_vinsn with cur_vinsn to fix a leak.
(convert_frag_immed): Likewise.
(convert_frag_narrow): Check is_aligning_branch flag.
* config/tc-xtensa.h (xtensa_frag_type): Add is_aligning_branch flag.