arc: include/asm: fix typos of "themselves"

Fix copy/paste spello of "themselves" in 3 places.

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Vineet Gupta <[e-mail]>
Cc: [e-mail]
Signed-off-by: Vineet Gupta <[e-mail]>

arch/arc/include/asm/atomic.h

···
 									\
 	/*								\
 	 * Explicit full memory barrier needed before/after as		\
-	 * LLOCK/SCOND thmeselves don't provide any such semantics	\
+	 * LLOCK/SCOND themselves don't provide any such semantics	\
 	 */								\
 	smp_mb();							\
 									\
···
 									\
 	/*								\
 	 * Explicit full memory barrier needed before/after as		\
-	 * LLOCK/SCOND thmeselves don't provide any such semantics	\
+	 * LLOCK/SCOND themselves don't provide any such semantics	\
 	 */								\
 	smp_mb();							\
 									\

arch/arc/include/asm/cmpxchg.h

···
 
 	/*
 	 * Explicit full memory barrier needed before/after as
-	 * LLOCK/SCOND thmeselves don't provide any such semantics
+	 * LLOCK/SCOND themselves don't provide any such semantics
 	 */
 	smp_mb();