Pull up following revision(s) (requested by nonaka in ticket #782):

sys/dev/usb/if_axe.c: revision 1.85-1.89

propagate pullup-782 for NetBSD-8 to HEAD (gcc uninitialized)

It was not gcc's fault for correctly detecting an uninitialized variable.

Fix the uninitialized variable issues by error checking things.
downgrade error to debug.

merge duplicated code, back to logging error.

use the proper station nodeid read command.

(martin)