[libata] Move PCI IDE BMDMA-related code to new file libata-bmdma.c.

drivers/scsi/Makefile

@@ -163,7 +163,7 @@ ncr53c8xx-flags-$(CONFIG_SCSI_ZALON) \
 CFLAGS_ncr53c8xx.o	:= $(ncr53c8xx-flags-y) $(ncr53c8xx-flags-m)
 zalon7xx-objs	:= zalon.o ncr53c8xx.o
 NCR_Q720_mod-objs	:= NCR_Q720.o ncr53c8xx.o
-libata-objs	:= libata-core.o libata-scsi.o
+libata-objs	:= libata-core.o libata-scsi.o libata-bmdma.o
 oktagon_esp_mod-objs	:= oktagon_esp.o oktagon_io.o
 
 # Files generated that shall be removed upon make clean