drm: bridge: anx7625: implement minimal Type-C support

drm: bridge: anx7625: implement minimal Type-C support

ANX7625 can be used as a USB-C controller, handling USB and DP data
streams. Provide minimal Type-C support necessary for ANX7625 to
register the Type-C port device and properly respond to data / power
role events from the Type-C partner.

While ANX7625 provides TCPCI interface, using it would circumvent the
on-chip running firmware. Analogix recommended using the higher-level
interface instead of TCPCI.

Reviewed-by: Xin Ji <xji@analogixsemi.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260121-anx7625-typec-v2-2-d14f31256a17@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>