[libata] export ata_dev_set_feature()

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 2c27016..611050d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4491,6 +4491,7 @@
 	DPRINTK("EXIT, err_mask=%x\n", err_mask);
 	return err_mask;
 }
+EXPORT_SYMBOL_GPL(ata_dev_set_feature);
 
 /**
  *	ata_dev_init_params - Issue INIT DEV PARAMS command