Transplantation of Uclinux-2008r1-rc8 (bf561) to VDSP5 (+): raw_rwlock_t

Since Uclinux does not support SMP, there is no such definition for raw_rwlock_t, which requires adding this definition to include/asm/spinlock_types.h:

typedef struct {
　　　　 volatile testset_t lock;
} raw_rwlock_t;

#define __RAW_RW_LOCK_UNLOCKED { 0 }

Then add the associated actions in the Include/asm/spinlock_types.h:

static inline void __raw_read_lock(raw_rwlock_t *rw)
{
　　　　 adi_acquire_lock(&rw->lock);
}

static inline void __raw_read_unlock(raw_rwlock_t *rw)
{
　　　　 adi_release_lock(&rw->lock);
}

static inline void __raw_write_lock(raw_rwlock_t *rw)
{
　　　　 adi_acquire_lock(&rw->lock);
}

static inline void __raw_write_unlock(raw_rwlock_t *rw)
{
　　　　 adi_release_lock(&rw->lock);
}