arm64: defconfig: build CONFIG_REGULATOR_QCOM_REFGEN as module

Enable CONFIG_REGULATOR_QCOM_REFGEN and build it as a module. It is an
internal supply used by the DSI on SM8350-based platforms (e.g. on the
SM8350 HDK device).
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240804-sm8350-fixes-v1-11-1149dd8399fe@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/configs/defconfig

@@ -785,6 +785,7 @@ CONFIG_REGULATOR_PCA9450=y
 CONFIG_REGULATOR_PF8X00=y
 CONFIG_REGULATOR_PFUZE100=y
 CONFIG_REGULATOR_PWM=y
+CONFIG_REGULATOR_QCOM_REFGEN=m
 CONFIG_REGULATOR_QCOM_RPMH=y
 CONFIG_REGULATOR_QCOM_SMD_RPM=y
 CONFIG_REGULATOR_QCOM_SPMI=y