add missing libsas configuration symbol

SVN-Revision: 17297

package/kernel/modules/block.mk

@@ -413,6 +413,7 @@ define KernelPackage/libsas
   TITLE:=SAS Domain Transport Attributes
   DEPENDS:=+kmod-scsi-core @TARGET_x86
   KCONFIG:=CONFIG_SCSI_SAS_LIBSAS \
+	CONFIG_SCSI_SAS_ATA=y \
 	CONFIG_SCSI_SAS_HOST_SMP=y \
 	CONFIG_SCSI_SAS_LIBSAS_DEBUG=y
   FILES:=$(LINUX_DIR)/drivers/scsi/libsas/libsas.$(LINUX_KMOD_SUFFIX)