chore: fix new clippy warnings on nightly

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

holo-bgp/src/packet/message.rs

@@ -1061,5 +1061,5 @@ pub(crate) fn decode_ipv6_prefix(
 
 // Calculates the number of bytes required to encode a prefix.
 fn prefix_wire_len(len: u8) -> usize {
-    (len as usize + 7) / 8
+    (len as usize).div_ceil(8)
 }

holo-isis/src/interface.rs

@@ -441,7 +441,7 @@ impl Interface {
     }
 
     pub(crate) fn is_dis(&self, level: LevelNumber) -> bool {
-        self.state.dis.get(level).map_or(false, |dis| dis.myself)
+        self.state.dis.get(level).is_some_and(|dis| dis.myself)
     }
 
     pub(crate) fn dis_start(&mut self, instance: &mut InstanceUpView<'_>) {

holo-isis/src/packet/tlv.rs

@@ -1346,7 +1346,7 @@ impl<T: MultiTlv> Tlv for T {
 
 // Calculates the number of bytes required to encode a prefix.
 const fn prefix_wire_len(len: u8) -> usize {
-    (len as usize + 7) / 8
+    (len as usize).div_ceil(8)
 }
 
 fn tlv_encode_start(buf: &mut BytesMut, tlv_type: impl ToPrimitive) -> usize {

holo-ldp/src/packet/messages/label.rs

@@ -644,5 +644,5 @@ impl TlvKind for TlvLabelRequestId {
 
 // Calculate the number of bytes required to encode a prefix.
 fn prefix_wire_len(len: u8) -> usize {
-    (len as usize + 7) / 8
+    (len as usize).div_ceil(8)
 }

holo-ospf/src/ospfv3/packet/lsa.rs

@@ -2880,7 +2880,7 @@ impl LsaVersion<Self> for Ospfv3 {
 
 // Calculate the number of bytes required to encode a prefix.
 fn prefix_wire_len(len: u8) -> usize {
-    ((len as usize + 31) / 32) * 4
+    (len as usize).div_ceil(32) * 4
 }
 
 fn decode_16bit_addr(af: AddressFamily, buf: &mut Bytes) -> IpAddr {