crypto: safexcel - Remove unused declaration safexcel_ring_first_rptr()

Commit 9744fec9 ("crypto: inside-secure - remove request list to
improve performance") declar this but never implemented.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/inside-secure/safexcel.h

@@ -897,7 +897,6 @@ int safexcel_init_ring_descriptors(struct safexcel_crypto_priv *priv,
 int safexcel_select_ring(struct safexcel_crypto_priv *priv);
 void *safexcel_ring_next_rptr(struct safexcel_crypto_priv *priv,
 			      struct safexcel_desc_ring *ring);
-void *safexcel_ring_first_rptr(struct safexcel_crypto_priv *priv, int  ring);
 void safexcel_ring_rollback_wptr(struct safexcel_crypto_priv *priv,
 				 struct safexcel_desc_ring *ring);
 struct safexcel_command_desc *safexcel_add_cdesc(struct safexcel_crypto_priv *priv,