Rename libata-bmdma.c to libata-sff.c.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index c17ae9c..e260e3f 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -17,5 +17,5 @@
 obj-$(CONFIG_SATA_MV)		+= sata_mv.o
 obj-$(CONFIG_PDC_ADMA)		+= pdc_adma.o
 
-libata-objs	:= libata-core.o libata-scsi.o libata-bmdma.o libata-eh.o
+libata-objs	:= libata-core.o libata-scsi.o libata-sff.o libata-eh.o