perf tools: Remove needless perf.h include directive from headers

Its not needed there, add it to the places that need it and were getting
it via those headers.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-5yulx1u16vyd0zmrbg1tjhju@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/mmap.c

@@ -16,6 +16,7 @@
 #include "debug.h"
 #include "event.h"
 #include "mmap.h"
+#include "../perf.h"
 #include "util.h" /* page_size */
 
 size_t perf_mmap__mmap_len(struct perf_mmap *map)