[media] fc2580: define const as UL to silence a warning

fc2580.c: In function 'fc2580_set_params':
fc2580.c:150: warning: this decimal constant is unsigned only in ISO C90

Signed-off-by: Gianluca Gennari <gennarone@gmail.com>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/tuners/fc2580.c

@@ -147,7 +147,7 @@ static int fc2580_set_params(struct dvb_frontend *fe)
 	f_vco = c->frequency;
 	f_vco *= fc2580_pll_lut[i].div;
 
-	if (f_vco >= 2600000000)
+	if (f_vco >= 2600000000UL)
 		tmp_val = 0x0e | fc2580_pll_lut[i].band;
 	else
 		tmp_val = 0x06 | fc2580_pll_lut[i].band;