arch,score: Convert smp_mb__*()

score fully relies on asm-generic/barrier.h, so it can use its default
implementation.

Signed-off-by: Peter Zijlstra <[e-mail]>
Acked-by: Paul E. McKenney <[e-mail]>
Acked-by: Lennox Wu <[e-mail]>
Link: http://lkml.kernel.org/n/[e-mail]
Cc: Chen Liqin <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Cc: [e-mail]
Signed-off-by: Ingo Molnar <[e-mail]>

arch/score/include/asm/bitops.h

···
 #define _ASM_SCORE_BITOPS_H
 
 #include <asm/byteorder.h> /* swab32 */
-
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit()	barrier()
-#define smp_mb__after_clear_bit()	barrier()
+#include <asm/barrier.h>
 
 #include <asm-generic/bitops.h>
 #include <asm-generic/bitops/__fls.h>