typec: fusb302: Use dev_err during probe

If probe fails, fusb302_debugfs_exit is called making it impossible
to view any logs so use normal dev_err for any error messages during
probe.

Signed-off-by: Mats Karrman <mats.dev.list@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>