usb: typec: ps883x: fix missing accessibility check

Make sure that the retimer is accessible before registering to avoid
having later consumer calls fail to configure it, something which, for
example, can lead to a hotplugged display not being recognised:

	[drm:msm_dp_panel_read_sink_caps [msm]] *ERROR* read dpcd failed -110

Fixes: 257a087c ("usb: typec: Add support for Parade PS8830 Type-C Retimer")
Cc: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20250218152933.22992-3-johan+linaro@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>