Staging: vt6655 textual cleanup in prep for driver merge

The vt6655 and vt6656 drivers are from a common origin but
have drifted apart with minor textual differences.  There
are two changes:

  s/DEVICE_PRT/DBG_PRT/g

and

  s/byPktTyp/byPktType/g

This significantly reduces the differences between the two file sets
in preparation to merging the common code.  A few whitespace and text bits were
also adjusted.

Signed-off-by: Jim Lieb <lieb@canonical.com>
Cc: Forest Bond <forest@alittletooquiet.net>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>