usb: typec: tps6598x: Add trace event for power status register

Together with the PD status register this is vital for debugging power
negotiations at runtime.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Link: https://lore.kernel.org/r/3c92da489fa03d6fe67ac18443c48dccb1bf048a.1613389531.git.agx@sigxcpu.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>