usb: typec: tipd: Only update power status on IRQ

Instead of refetching power status cache it and only update it when a
change is signalled via irq. This simplifies tracing and adding more
supply properties in follow up patches.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20220317154518.4082046-2-sebastian.krzyszkowiak@puri.sm
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>