V4L/DVB: gspca - gl860: text alignment

- Extra spaces to align some variable names and a defined value

Signed-off-by: Olivier Lorin <o.lorin@laposte.net>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>