[SPARC32]: Use correct atomic initializer for semaphore counters

Semaphores use 24-bit atomics, not 32.  Using the wrong initializer
causes immediate deadlock under SMP, and incorrect results under UP.

include/asm-sparc/semaphore.h

@@ -26,7 +26,7 @@ struct semaphore {
 #endif
 
 #define __SEMAPHORE_INITIALIZER(name,count) \
-{ ATOMIC_INIT(count), 0, __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
+{ ATOMIC24_INIT(count), 0, __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
 	__SEM_DEBUG_INIT(name) }
 
 #define __MUTEX_INITIALIZER(name) \