[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 <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>

include/asm-ia64/mutex.h

···
 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;
 }