perfcounter tools: make rdclock an inline function

#define PR_TASK_PERF_COUNTERS_DISABLE   31

#define PR_TASK_PERF_COUNTERS_ENABLE    32

#define rdclock()					\

({							\

	struct timespec ts;				\

							\

	clock_gettime(CLOCK_MONOTONIC, &ts);		\

	ts.tv_sec * 1000000000ULL + ts.tv_nsec;		\

})

#ifndef NSEC_PER_SEC

# define NSEC_PER_SEC			1000000000ULL

#endif

static inline unsigned long long rdclock(void)

{

	struct timespec ts;

	clock_gettime(CLOCK_MONOTONIC, &ts);

	return ts.tv_sec * 1000000000ULL + ts.tv_nsec;

}

/*

 * Pick up some kernel type conventions: