usb: pd: Update dual_role_usb in case of legacy cable

In the case of a non-PD legacy cable insertion, make sure to
update the dual_role_usb class so that the current power and
data roles (sink, ufp) are correctly notified to userland.

Change-Id: I8e41b57e8ac73bea8879374ad6e1e9fde954538d
Signed-off-by: Jack Pham <jackp@codeaurora.org>