md: select BLOCK_LEGACY_AUTOLOAD

When BLOCK_LEGACY_AUTOLOAD is not enable, mdadm is not able to
activate new arrays unless "CREATE names=yes" appears in
mdadm.conf

As this is a regression we need to always enable BLOCK_LEGACY_AUTOLOAD
for when MD is selected - at least until mdadm is updated and the
updates widely available.

Cc: stable@vger.kernel.org # v5.18+
Fixes: fbdee71bb5 ("block: deprecate autoloading based on dev_t")
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Song Liu <song@kernel.org>

drivers/md/Kconfig

@@ -16,6 +16,10 @@ if MD
 config BLK_DEV_MD
 	tristate "RAID support"
 	select BLOCK_HOLDER_DEPRECATED if SYSFS
+	# BLOCK_LEGACY_AUTOLOAD requirement should be removed
+	# after relevant mdadm enhancements - to make "names=yes"
+	# the default - are widely available.
+	select BLOCK_LEGACY_AUTOLOAD
 	help
 	  This driver lets you combine several hard disk partitions into one
 	  logical block device. This can be used to simply append one