w1: ds2413: output_write() cosmetic fixes / simplify

Make the output_write simpler.
Based on Jean-Francois Dagenais code from:
49695ac4

 ("w1: ds2408: reset on output_write retry with readback")

Signed-off-by: Mariusz Bialonczyk <manio@skyboo.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>