cxgb4: remove unused fn to enable/disable db coalescing

Remove unused function cxgb4_enable_db_coalescing() and
cxgb4_disable_db_coalescing()

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c

@@ -2069,25 +2069,6 @@ out:
 }
 EXPORT_SYMBOL(cxgb4_sync_txq_pidx);
 
-void cxgb4_disable_db_coalescing(struct net_device *dev)
-{
-	struct adapter *adap;
-
-	adap = netdev2adap(dev);
-	t4_set_reg_field(adap, SGE_DOORBELL_CONTROL_A, NOCOALESCE_F,
-			 NOCOALESCE_F);
-}
-EXPORT_SYMBOL(cxgb4_disable_db_coalescing);
-
-void cxgb4_enable_db_coalescing(struct net_device *dev)
-{
-	struct adapter *adap;
-
-	adap = netdev2adap(dev);
-	t4_set_reg_field(adap, SGE_DOORBELL_CONTROL_A, NOCOALESCE_F, 0);
-}
-EXPORT_SYMBOL(cxgb4_enable_db_coalescing);
-
 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte)
 {
 	struct adapter *adap;

drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h

@@ -298,8 +298,6 @@ struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
 				   unsigned int skb_len, unsigned int pull_len);
 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
 int cxgb4_flush_eq_cache(struct net_device *dev);
-void cxgb4_disable_db_coalescing(struct net_device *dev);
-void cxgb4_enable_db_coalescing(struct net_device *dev);
 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte);
 u64 cxgb4_read_sge_timestamp(struct net_device *dev);