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/pata_sil680.c b/drivers/ata/pata_sil680.c
index 63fafc6..720b864 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -350,19 +350,19 @@
 	host->ports[0]->ioaddr.cmd_addr = mmio_base + 0x80;
 	host->ports[0]->ioaddr.ctl_addr = mmio_base + 0x8a;
 	host->ports[0]->ioaddr.altstatus_addr = mmio_base + 0x8a;
-	ata_std_ports(&host->ports[0]->ioaddr);
+	ata_sff_std_ports(&host->ports[0]->ioaddr);
 	host->ports[1]->ioaddr.bmdma_addr = mmio_base + 0x08;
 	host->ports[1]->ioaddr.cmd_addr = mmio_base + 0xc0;
 	host->ports[1]->ioaddr.ctl_addr = mmio_base + 0xca;
 	host->ports[1]->ioaddr.altstatus_addr = mmio_base + 0xca;
-	ata_std_ports(&host->ports[1]->ioaddr);
+	ata_sff_std_ports(&host->ports[1]->ioaddr);
 
 	/* Register & activate */
-	return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
-				 &sil680_sht);
+	return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+				 IRQF_SHARED, &sil680_sht);
 
 use_ioports:
-	return ata_pci_init_one(pdev, ppi, &sil680_sht, NULL);
+	return ata_pci_sff_init_one(pdev, ppi, &sil680_sht, NULL);
 }
 
 #ifdef CONFIG_PM