perf tools: Move ACCESS_ONCE from perf.h header

Into tools/include/linux/compiler.h header.

Acked-by: Arnaldo Carvalho de Melo <[e-mail]>
Acked-by: Peter Zijlstra <[e-mail]>
Cc: Arnaldo Carvalho de Melo <[e-mail]>
Cc: Corey Ashford <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: David Ahern <[e-mail]>
Cc: Frederic Weisbecker <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Link: http://lkml.kernel.org/n/[e-mail]
Signed-off-by: Jiri Olsa <[e-mail]>

tools/include/linux/compiler.h

···
 # define unlikely(x)		__builtin_expect(!!(x), 0)
 #endif
 
+#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
+
 #endif /* _TOOLS_LINUX_COMPILER_H */

tools/perf/perf.h

···
 #define HAVE_ATTR_TEST
 #include "perf-sys.h"
 
-#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
-
 #ifndef NSEC_PER_SEC
 # define NSEC_PER_SEC			1000000000ULL
 #endif