signal/x86: In trace_mpx_bounds_register_exception add __user annotations

The value passed in to addr_referenced is of type void __user *, so update
the addr_referenced parameter in trace_mpx_bounds_register_exception to match.

Also update the addr_referenced paramater in TP_STRUCT__entry as it again
holdes the same value.

I don't know why this was missed earlier but sparse was complaining when
testing test branch so fix this now.
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

arch/x86/include/asm/trace/mpx.h

@@ -11,12 +11,12 @@
 
 TRACE_EVENT(mpx_bounds_register_exception,
 
-	TP_PROTO(void *addr_referenced,
+	TP_PROTO(void __user *addr_referenced,
 		 const struct mpx_bndreg *bndreg),
 	TP_ARGS(addr_referenced, bndreg),
 
 	TP_STRUCT__entry(
-		__field(void *, addr_referenced)
+		__field(void __user *, addr_referenced)
 		__field(u64, lower_bound)
 		__field(u64, upper_bound)
 	),