arm64: defconfig: enable WCD939x USBSS driver as module

Enable the Qualcomm WCD939x USBSS Type-C mux as module as
is now used on the SM8650 QRD platform.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240123-topic-sm8650-upstream-altmode-v3-2-300a5ac80e1e@linaro.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>