This patch corrects merely the spaces in the usx2y code, including the
superfluous trailing space in the debug prints and a slight reformat
of some comment lines.  Nothing really touches about the code itself.

Link: https://lore.kernel.org/r/20210517131545.27252-3-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>