[media] stb0899: fix diseqc messages getting lost

- Some badly written applications in conjuction with certain SEC devices
do send too many messages causing the DiSEqC bus to get congested. As
a result, the end devices do get confused and hence do not respond.
The issue was found by Julian Scheel.

Signed-off-by: Manu Abraham <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/dvb/frontends/stb0899_drv.c

···
 	reg = stb0899_read_reg(state, STB0899_DISCNTRL1);
 	STB0899_SETFIELD_VAL(DISPRECHARGE, reg, 0);
 	stb0899_write_reg(state, STB0899_DISCNTRL1, reg);
-
+	msleep(100);
 	return 0;
 }