libata: rename SFF functions

SFF functions have confusing names.  Some have sff prefix, some have
bmdma, some std, some pci and some none.  Unify the naming by...

* SFF functions which are common to both BMDMA and non-BMDMA are
  prefixed with ata_sff_.

* SFF functions which are specific to BMDMA are prefixed with
  ata_bmdma_.

* SFF functions which are specific to PCI but apply to both BMDMA and
  non-BMDMA are prefixed with ata_pci_sff_.

* SFF functions which are specific to PCI and BMDMA are prefixed with
  ata_pci_bmdma_.

* Drop generic prefixes from LLD specific routines.  For example,
  bfin_std_dev_select -> bfin_dev_select.

The following renames are noteworthy.

  ata_qc_issue_prot() -> ata_sff_qc_issue()
  ata_pci_default_filter() -> ata_bmdma_mode_filter()
  ata_dev_try_classify() -> ata_sff_dev_classify()

This rename is in preparation of separating SFF support out of libata
core layer.  This patch strictly renames functions and doesn't
introduce any behavior difference.

Signed-off-by: Tejun Heo <htejun@gmail.com>
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 659dfcb..987313b 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -410,10 +410,10 @@
 		goto err_hsm;
 
 	/* ack bmdma irq events */
-	ata_bmdma_irq_clear(ap);
+	ata_sff_irq_clear(ap);
 
 	/* kick HSM in the ass */
-	ata_hsm_move(ap, qc, status, 0);
+	ata_sff_hsm_move(ap, qc, status, 0);
 
 	if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
 		ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
@@ -481,7 +481,7 @@
 
 	/* clear IRQ */
 	ap->ops->check_status(ap);
-	ata_bmdma_irq_clear(ap);
+	ata_sff_irq_clear(ap);
 
 	/* turn on SATA IRQ if supported */
 	if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
@@ -655,7 +655,7 @@
 		ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
 		ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
 		ioaddr->scr_addr = mmio_base + sil_port[i].scr;
-		ata_std_ports(ioaddr);
+		ata_sff_std_ports(ioaddr);
 
 		ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
 		ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");