usb: typec: ucsi: Fix a comment in ucsi_init()

ucsi_unregister_ppm() got replaced with ucsi_unregister(). Fix
the comment in ucsi_init() as well.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
Link: https://lore.kernel.org/r/1623274076-6287-1-git-send-email-subbaram@codeaurora.org


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