V4L/DVB (11794): au0828: reduce reset time for xc5000 to 10ms

The xc5000 datasheet indicates that the reset pin only needs to be held low
for 10ms.  Reduce the value accordingly, which speeds up the firmware load
time a bit.

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>