media: cxd2841er: use DIV_ROUND_UP to calculate timeout

Don't open-code DIV_ROUND_UP() kernel macro.
Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com>
Reported-by: Nkernel test robot <lkp@intel.com>
Signed-off-by: NSean Young <sean@mess.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/dvb-frontends/cxd2841er.c

@@ -3338,7 +3338,7 @@ static int cxd2841er_set_frontend_s(struct dvb_frontend *fe)
 		cxd2841er_tuner_set(fe);
 
 	cxd2841er_tune_done(priv);
-	timeout = ((3000000 + (symbol_rate - 1)) / symbol_rate) + 150;
+	timeout = DIV_ROUND_UP(3000000, symbol_rate) + 150;
 
 	i = 0;
 	do {