RISC-V: Remove smb_mb__{before,after}_spinlock()

#define smp_rmb()	RISCV_FENCE(r,r)

#define smp_wmb()	RISCV_FENCE(w,w)

/*

 * These barriers prevent accesses performed outside a spinlock from being moved

 * inside a spinlock.  Since RISC-V sets the aq/rl bits on our spinlock only

 * enforce release consistency, we need full fences here.

 */

#define smb_mb__before_spinlock()	smp_mb()

#define smb_mb__after_spinlock()	smp_mb()

#include <asm-generic/barrier.h>

#endif /* __ASSEMBLY__ */