staging: ccree: remove unused function

The function set_ack_last was not used anywhere. Remove it.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ccree/cc_hw_queue_defs.h

@@ -225,18 +225,6 @@ static inline void set_queue_last_ind(struct cc_hw_desc *pdesc)
 	pdesc->word[3] |= FIELD_PREP(WORD3_QUEUE_LAST_IND, 1);
 }
 
-/*
- * Signs the end of HW descriptors flow by asking for completion ack,
- * and release the HW engines
- *
- * @pdesc: pointer HW descriptor struct
- */
-static inline void set_ack_last(struct cc_hw_desc *pdesc)
-{
-	pdesc->word[3] |= FIELD_PREP(WORD3_QUEUE_LAST_IND, 1);
-	pdesc->word[4] |= FIELD_PREP(WORD4_ACK_NEEDED, 1);
-}
-
 /*
  * Set the DIN field of a HW descriptors
  *