dt-bindings: vcpu_stall_detector: Add a PPI interrupt to the virtual device

dt-bindings: vcpu_stall_detector: Add a PPI interrupt to the virtual device

The vcpu stall detector allows the host to monitor the availability of a
guest VM. Introduce a PPI interrupt which can be injected from the host
into the virtual gic to let the guest reboot itself.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Sebastian Ene <sebastianene@google.com>
Link: https://lore.kernel.org/r/20240703153732.3214238-2-sebastianene@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>