[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/netfilter/xt_connmark.c b/net/netfilter/xt_connmark.c
index 71f3c1a..3a6e16d 100644
--- a/net/netfilter/xt_connmark.c
+++ b/net/netfilter/xt_connmark.c
@@ -48,7 +48,7 @@
 	if (!ct)
 		return false;
 
-	return (((ct->mark) & info->mask) == info->mark) ^ info->invert;
+	return ((ct->mark & info->mask) == info->mark) ^ info->invert;
 }
 
 static bool