blkio: Allow CFQ group IO scheduling even when CFQ is a module

o Now issues of blkio controller and CFQ in module mode should be fixed.
  Enable the cfq group scheduling support in module mode.
Signed-off-by: NVivek Goyal <vgoyal@redhat.com>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

block/Kconfig.iosched

@@ -34,7 +34,7 @@ config IOSCHED_CFQ
 
 config CFQ_GROUP_IOSCHED
 	bool "CFQ Group Scheduling support"
-	depends on IOSCHED_CFQ=y && CGROUPS
+	depends on IOSCHED_CFQ && CGROUPS
 	select BLK_CGROUP
 	default n
 	---help---