bpftool: Update btf_dump__new() and perf_buffer__new_raw() calls

Use v1.0-compatible variants of btf_dump and perf_buffer "constructors".
This is also a demonstration of reusing struct perf_buffer_raw_opts as
OPTS-style option struct for new perf_buffer__new_raw() API.

Signed-off-by: Andrii Nakryiko <[e-mail]>
Signed-off-by: Alexei Starovoitov <[e-mail]>
Link: https://lore.kernel.org/bpf/[e-mail]

tools/bpf/bpftool/btf.c

···
 	struct btf_dump *d;
 	int err = 0, i;
 
-	d = btf_dump__new(btf, NULL, NULL, btf_dump_printf);
+	d = btf_dump__new(btf, btf_dump_printf, NULL, NULL);
 	if (IS_ERR(d))
 		return PTR_ERR(d);
 

tools/bpf/bpftool/gen.c

···
 	char sec_ident[256], map_ident[256];
 	int i, err = 0;
 
-	d = btf_dump__new(btf, NULL, NULL, codegen_btf_dump_printf);
+	d = btf_dump__new(btf, codegen_btf_dump_printf, NULL, NULL);
 	if (IS_ERR(d))
 		return PTR_ERR(d);
 

tools/bpf/bpftool/map_perf_ring.c

···
 		.wakeup_events = 1,
 	};
 	struct bpf_map_info map_info = {};
-	struct perf_buffer_raw_opts opts = {};
+	LIBBPF_OPTS(perf_buffer_raw_opts, opts);
 	struct event_pipe_ctx ctx = {
 		.all_cpus = true,
 		.cpu = -1,
···
 		ctx.idx = 0;
 	}
 
-	opts.attr = &perf_attr;
-	opts.event_cb = print_bpf_output;
-	opts.ctx = &ctx;
 	opts.cpu_cnt = ctx.all_cpus ? 0 : 1;
 	opts.cpus = &ctx.cpu;
 	opts.map_keys = &ctx.idx;
-
-	pb = perf_buffer__new_raw(map_fd, MMAP_PAGE_CNT, &opts);
+	pb = perf_buffer__new_raw(map_fd, MMAP_PAGE_CNT, &perf_attr,
+				  print_bpf_output, &ctx, &opts);
 	err = libbpf_get_error(pb);
 	if (err) {
 		p_err("failed to create perf buffer: %s (%d)",