tools lib: Adopt zalloc()/zfree() from tools/perf

Eroding a bit more the tools/perf/util/util.h hodpodge header.

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-natazosyn9rwjka25tvcnyi0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/arch/x86/util/event.c

@@ -1,11 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/types.h>
 #include <linux/string.h>
+#include <linux/zalloc.h>
 
 #include "../../util/machine.h"
 #include "../../util/tool.h"
 #include "../../util/map.h"
-#include "../../util/util.h"
 #include "../../util/debug.h"
 
 #if defined(__x86_64__)

tools/perf/arch/x86/util/intel-bts.c

@@ -9,12 +9,12 @@
 #include <linux/types.h>
 #include <linux/bitops.h>
 #include <linux/log2.h>
+#include <linux/zalloc.h>
 
 #include "../../util/cpumap.h"
 #include "../../util/evsel.h"
 #include "../../util/evlist.h"
 #include "../../util/session.h"
-#include "../../util/util.h"
 #include "../../util/pmu.h"
 #include "../../util/debug.h"
 #include "../../util/tsc.h"

tools/perf/arch/x86/util/intel-pt.c

@@ -10,6 +10,7 @@
 #include <linux/types.h>
 #include <linux/bitops.h>
 #include <linux/log2.h>
+#include <linux/zalloc.h>
 #include <cpuid.h>
 
 #include "../../perf.h"
@@ -25,7 +26,6 @@
 #include "../../util/auxtrace.h"
 #include "../../util/tsc.h"
 #include "../../util/intel-pt.h"
-#include "../../util/util.h"
 
 #define KiB(x) ((x) * 1024)
 #define MiB(x) ((x) * 1024 * 1024)

tools/perf/arch/x86/util/perf_regs.c

@@ -2,9 +2,9 @@
 #include <errno.h>
 #include <string.h>
 #include <regex.h>
+#include <linux/zalloc.h>
 
 #include "../../perf.h"
-#include "../../util/util.h"
 #include "../../util/perf_regs.h"
 #include "../../util/debug.h"