md: fix how device node is created and removed

JIRA: https://issues.redhat.com/browse/RHEL-94433
Upstream Status: RHEL-Only

This fixes when asynchronous stopping an array
changes to synchronous stopping the array.

Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Nigel Croxon <ncroxon@redhat.com>

Author: ncroxon

drivers/md/md.c

@@ -340,7 +340,7 @@ static int start_readonly;
  * so all the races disappear.
  */
 static bool create_on_open = true;
-static bool legacy_async_del_gendisk = true;
+static bool legacy_async_del_gendisk = false;
 
 /*
  * We have a system wide 'event count' that is incremented