[media] m88ds3103: I/O optimize inittab write

Write inittab using reg address auto-increment in order to reduce
I/O a little bit.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --cc drivers/media/dvb-frontends/m88ds3103.c
Simple merge