tools/net: Use bitwise instead of arithmetic operator for flags

This silences the following coccinelle warning:

"WARNING: sum of probable bitmasks, consider |"

Reported-by: Zeal Robot <[e-mail]>
Signed-off-by: jing yangyang <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

tools/testing/selftests/net/psock_fanout.c

···
 static void sock_fanout_set_cbpf(int fd)
 {
 	struct sock_filter bpf_filter[] = {
-		BPF_STMT(BPF_LD+BPF_B+BPF_ABS, 80),	      /* ldb [80] */
-		BPF_STMT(BPF_RET+BPF_A, 0),		      /* ret A */
+		BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 80),	      /* ldb [80] */
+		BPF_STMT(BPF_RET | BPF_A, 0),		      /* ret A */
 	};
 	struct sock_fprog bpf_prog;