x86, ptrace: use jiffies for BTS timestamps

Replace sched_clock() with jiffies for BTS timestamps.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/ds.h b/include/asm-x86/ds.h
index edd8467..c9e1538 100644
--- a/include/asm-x86/ds.h
+++ b/include/asm-x86/ds.h
@@ -48,7 +48,7 @@
 		} lbr;
 		/* BTS_TASK_ARRIVES or
 		   BTS_TASK_DEPARTS */
-		unsigned long long timestamp;
+		unsigned long jiffies;
 	} variant;
 };