[media] m88ds3103: use jiffies when polling DiSEqC TX ready

Use jiffies to set timeout for DiSEqC TX ready polling. Using jiffies
is more elegant solution than looping N times with sleep.

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