Add binding doc for safety IRQ. The safety IRQ will be
triggered for ECC(error correction code), DPP(data path
parity), FSM(finite state machine) error.
Signed-off-by: Suraj Jaiswal <quic_jsuraj@quicinc.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>