[IA64] fix bug in ia64 __mutex_fastpath_trylock

The parenthesis around "likely" used in ia64 __mutex_fastpath_trylock
is incorrect, and it leads to broken mutex_trylock.  Here is the
patch that fixed the bug.  I removed the likely altogether because
there is no branch and gcc does a reasonable job at predicating the
return value.
Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

include/asm-ia64/mutex.h

@@ -84,7 +84,7 @@ __mutex_fastpath_unlock(atomic_t *count, void (*fail_fn)(atomic_t *))
 static inline int
 __mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *))
 {
-	if (likely(cmpxchg_acq(count, 1, 0)) == 1)
+	if (cmpxchg_acq(count, 1, 0) == 1)
 		return 1;
 	return 0;
 }