qcacmn: Clean up DP API's

Remove DP API's which are not being used/defined.

Change-Id: I8a1ee7e3156873227131b526793f464ff4444312
CRs-Fixed: 2483400

dp/wifi3.0/dp_rx.h

@@ -1134,9 +1134,6 @@ dp_pdev_rx_buffers_attach(struct dp_soc *dp_soc, uint32_t mac_id,
 QDF_STATUS
 dp_rx_link_desc_return(struct dp_soc *soc, void *ring_desc, uint8_t bm_action);
 
-QDF_STATUS
-dp_rx_link_desc_buf_return(struct dp_soc *soc, struct dp_srng *dp_rxdma_srng,
-				void *buf_addr_info, uint8_t bm_action);
 /**
  * dp_rx_link_desc_return_by_addr - Return a MPDU link descriptor to
  *					(WBM) by address