mfd: qcom-spmi-pmic: Switch to EXPORT_SYMBOL_GPL()

Switch to using EXPORT_SYMBOL_GPL() for the revid helper as there is no
reason not to use it.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Acked-by: Caleb Connolly <caleb.connolly@linaro.org>
Link: https://lore.kernel.org/r/20231003152927.15000-4-johan+linaro@kernel.orgSigned-off-by: Lee Jones <lee@kernel.org>

drivers/mfd/qcom-spmi-pmic.c

@@ -241,7 +241,7 @@ const struct qcom_spmi_pmic *qcom_pmic_get(struct device *dev)
 
 	return &spmi->pmic;
 }
-EXPORT_SYMBOL(qcom_pmic_get);
+EXPORT_SYMBOL_GPL(qcom_pmic_get);
 
 static const struct regmap_config spmi_regmap_config = {
 	.reg_bits	= 16,