V4L/DVB: dvb: fix sparse warnings

Fix sparse warnings in media/dvb/frontends:

drivers/media/dvb/frontends/dibx000_common.c:177:13: warning: non-ANSI function declaration of function 'systime'
drivers/media/dvb/frontends/tda665x.c:136:55: warning: right shift by bigger than source value

[mchehab@redhat.com: removed the change at dib0090 since it got fixed by a previous patch]
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/dibx000_common.c

@@ -174,7 +174,7 @@ void dibx000_exit_i2c_master(struct dibx000_i2c_master *mst)
 EXPORT_SYMBOL(dibx000_exit_i2c_master);
 
 
-u32 systime()
+u32 systime(void)
 {
     struct timespec t;
 

drivers/media/dvb/frontends/tda665x.c

@@ -133,7 +133,7 @@ static int tda665x_set_state(struct dvb_frontend *fe,
 		frequency += config->ref_divider >> 1;
 		frequency /= config->ref_divider;
 
-		buf[0] = (u8) (frequency & 0x7f00) >> 8;
+		buf[0] = (u8) ((frequency & 0x7f00) >> 8);
 		buf[1] = (u8) (frequency & 0x00ff) >> 0;
 		buf[2] = 0x80 | 0x40 | 0x02;
 		buf[3] = 0x00;