arm64: defconfig: build PINCTRL_SM8250_LPASS_LPI as module

Enable the driver used to drive sound-related pins on Qualcomm SM8250
platform (Thundercomm RB5 board).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221210194500.464556-1-dmitry.baryshkov@linaro.org