layerscape: kernel: enable MC userspace support
Management Complex (MC) userspace support is required for userspace
helpers working with DPAA2 objects exported by the Management Complex BUS.
Without it, there is the error:
```
root@OpenWrt:/# ls-addni dpmac.1
error: Did not find a device file
Restool wrapper scripts only support the latest major MC version
that currently is MC10.x. Use with caution.
error: Did not find a device file
```
This patch fixes it.
Suggested-by: Alexandra Alth <[email protected]>
Signed-off-by: Pawel Dembicki <[email protected]>
Pawel Dembicki