md: do not count journal as spare in GET_ARRAY_INFO

GET_ARRAY_INFO counts journal as spare (spare_disks), which is not
accurate. This patch fixes this.

Reported-by: Yi Zhang <yizhan@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 2c3ab6f..d750b52 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5851,6 +5851,9 @@
 			working++;
 			if (test_bit(In_sync, &rdev->flags))
 				insync++;
+			else if (test_bit(Journal, &rdev->flags))
+				/* TODO: add journal count to md_u.h */
+				;
 			else
 				spare++;
 		}