move fis+fconfig packages under BR2_BLOCKDEV_SUPPORT

Move fis + fconfig packages together with mtd utils under
Hardware handling / blockdevices and filesystem maintenance.

package/Config.in

@@ -63,9 +63,7 @@ source "package/berkeleydb/Config.in"
 source "package/bsdiff/Config.in"
 source "package/customize/Config.in"
 source "package/dash/Config.in"
-source "package/fconfig/Config.in"
 source "package/file/Config.in"
-source "package/fis/Config.in"
 source "package/kexec/Config.in"
 if !BR2_PACKAGE_BUSYBOX_HIDE_OTHERS
 source "package/less/Config.in"
@@ -233,6 +231,8 @@ source "package/dbus-glib/Config.in"
 source "package/dm/Config.in"
 source "package/dmraid/Config.in"
 source "package/e2fsprogs/Config.in"
+source "package/fconfig/Config.in"
+source "package/fis/Config.in"
 source "package/fuse/Config.in"
 source "package/gadgetfs-test/Config.in"
 source "package/hal/Config.in"