The bindings expect "altr,rst-mgr" as a fallback in the rstmgr
compatible:

rstmgr@ffd11000: compatible: 'oneOf' conditional failed, one must be fixed:
        ['altr,stratix10-rst-mgr'] is too short
        'altr,rst-mgr' was expected
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>