Move these logic from raid0.c to md.c, so that we can also use it in
raid10.c.
Reviewed-by: NColy Li <colyli@suse.de>
Reviewed-by: NGuoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: NXiao Ni <xni@redhat.com>
Signed-off-by: NSong Liu <songliubraving@fb.com>