dm raid: select the Kconfig option CONFIG_MD_RAID0

Since the commit 0cf4503174c1 ("dm raid: add support for the MD RAID0
personality"), the dm-raid subsystem can activate a RAID-0 array.
Therefore, add MD_RAID0 to the dependencies of DM_RAID, so that MD_RAID0
will be selected when DM_RAID is selected.

Fixes: 0cf4503174c1 ("dm raid: add support for the MD RAID0 personality")
Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 5c5ed97..ee2c21e 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -357,6 +357,7 @@
 config DM_RAID
        tristate "RAID 1/4/5/6/10 target"
        depends on BLK_DEV_DM
+       select MD_RAID0
        select MD_RAID1
        select MD_RAID10
        select MD_RAID456