USB PD controllers which consisting of a microcontroller (acting as the TCPM)
and a port controller (TCPC) - may require that the driver for the PD
controller accesses directly also the on-chip port controller in some cases.

Move tcpci.h to include/linux/usb/ is convenience access TCPC registers.
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Xin Ji <xji@analogixsemi.com>

Link: https://lore.kernel.org/r/20220706083433.2415524-1-xji@analogixsemi.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>