fp5280g2: Add checkstop-monitor gpio configuration

Tested: Built fp5280g2 and verified that obmc-host-crash.target
was reached after error injection.

Signed-off-by: John Wang <wangzqbj@inspur.com>
Change-Id: Ifad36406a5b0cd5037ac32285dd4f9e74ffc1e07
2 files changed