media: siano: fix a potential integer overflow

Add suffix ULL to constant 65535 in order to avoid a potential
integer overflow. This constant is used in a context that
expects an expression of type u64.

Addresses-Coverity-ID: 1056806

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/common/siano/smsdvb-main.c

@@ -271,7 +271,7 @@ static void smsdvb_update_per_slices(struct smsdvb_client_t *client,
 	c->post_bit_count.stat[0].uvalue += p->ber_bit_count;
 
 	/* Legacy PER/BER */
-	tmp = p->ets_packets * 65535;
+	tmp = p->ets_packets * 65535ULL;
 	if (p->ts_packets + p->ets_packets)
 		do_div(tmp, p->ts_packets + p->ets_packets);
 	client->legacy_per = tmp;