usb: typec: ucsi: ucsi: Staticify and stop export of ucsi_init()

It isn't called from anywhere outside of ucsi.c.

Fixes the following W=1 kernel build warning(s):

 drivers/usb/typec/ucsi/ucsi.c:1005:5: warning: no previous prototype for ‘ucsi_init’ [-Wmissing-prototypes]
 1005 | int ucsi_init(struct ucsi *ucsi)
 | ^~~~~~~~~

Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200706133341.476881-25-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/typec/ucsi/ucsi.c

@@ -1002,7 +1002,7 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
  *
  * Registers all ports @ucsi has and enables all notification events.
  */
-int ucsi_init(struct ucsi *ucsi)
+static int ucsi_init(struct ucsi *ucsi)
 {
 	struct ucsi_connector *con;
 	u64 command;
@@ -1078,7 +1078,6 @@ int ucsi_init(struct ucsi *ucsi)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(ucsi_init);
 
 static void ucsi_init_work(struct work_struct *work)
 {