bpf: Simplify the calculation of variables

Fix the following coccicheck warnings:

./tools/bpf/bpf_dbg.c:1201:55-57: WARNING !A || A && B is equivalent to
!A || B.

Reported-by: Abaci Robot <[e-mail]>
Signed-off-by: Jiapeng Chong <[e-mail]>
Signed-off-by: Alexei Starovoitov <[e-mail]>
Acked-by: Yonghong Song <[e-mail]>
Link: https://lore.kernel.org/bpf/[e-mail]

tools/bpf/bpf_dbg.c

···
 		else
 			return CMD_OK;
 		bpf_reset();
-	} while (pcap_next_pkt() && (!has_limit || (has_limit && ++i < pkts)));
+	} while (pcap_next_pkt() && (!has_limit || (++i < pkts)));
 
 	rl_printf("bpf passes:%u fails:%u\n", pass, fail);