usb: typec: Introduce typec_get_drvdata()

Leaving the private driver_data pointer of the port device
to the port drivers.

Change-Id: Ib38c66e69a15904d5a8160312af6532f28712b67
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20191104142435.29960-3-heikki.krogerus@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: 8c127a42af89c39560a8c5bd5accadaaa5741f8c
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git


Signed-off-by: Jack Pham <jackp@codeaurora.org>