[NETFILTER]: Remove redundant parentheses/braces

Removes redundant parentheses and braces (And add one pair in a
xt_tcpudp.c macro).

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/netfilter/ip6t_eui64.c b/net/ipv6/netfilter/ip6t_eui64.c
index bebb12a..2af99fc 100644
--- a/net/ipv6/netfilter/ip6t_eui64.c
+++ b/net/ipv6/netfilter/ip6t_eui64.c
@@ -33,7 +33,7 @@
 	int i = 0;
 
 	if (!(skb_mac_header(skb) >= skb->head &&
-	      (skb_mac_header(skb) + ETH_HLEN) <= skb->data) &&
+	      skb_mac_header(skb) + ETH_HLEN <= skb->data) &&
 	    offset != 0) {
 		*hotdrop = true;
 		return false;
@@ -50,8 +50,8 @@
 			eui64[0] |= 0x02;
 
 			i = 0;
-			while ((ipv6_hdr(skb)->saddr.s6_addr[8 + i] == eui64[i])
-			       && (i < 8))
+			while (ipv6_hdr(skb)->saddr.s6_addr[8 + i] == eui64[i]
+			       && i < 8)
 				i++;
 
 			if (i == 8)