plat-stm32mp1: scmi_server: remove local function pwr_scmi_to_regu_id()

Removes local function pwr_scmi_to_regu_id() since its called only once.
This change makes get_voltd_regulator() local function easier to read.

Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

core/arch/arm/plat-stm32mp1/scmi_server.c

@@ -622,18 +622,6 @@ const char *plat_scmi_voltd_get_name(unsigned int channel_id,
 	return voltd->name;
 }
 
-static enum pwr_regulator pwr_scmi_to_regu_id(struct stm32_scmi_voltd *voltd)
-{
-	if (!strcmp(voltd->priv_id, PWR_REG11_NAME_ID))
-		return PWR_REG11;
-	if (!strcmp(voltd->priv_id, PWR_REG18_NAME_ID))
-		return PWR_REG18;
-	if (!strcmp(voltd->priv_id, PWR_USB33_NAME_ID))
-		return PWR_USB33;
-
-	panic();
-}
-
 int32_t plat_scmi_voltd_levels_array(unsigned int channel_id,
 				     unsigned int scmi_id, size_t start_index,
 				     long *levels, size_t *nb_elts)
@@ -850,13 +838,21 @@ int32_t plat_scmi_voltd_set_config(unsigned int channel_id,
 
 static void get_voltd_regulator(struct stm32_scmi_voltd *voltd)
 {
-	enum pwr_regulator regu_id = PWR_REGU_COUNT;
+	enum pwr_regulator pwr_regu_id = PWR_REGU_COUNT;
 	enum iod_regulator_id __maybe_unused iod_regu_id = IOD_REGU_COUNT;
 
 	switch (voltd->priv_dev) {
 	case VOLTD_PWR:
-		regu_id = pwr_scmi_to_regu_id(voltd);
-		voltd->regulator = stm32mp1_pwr_get_regulator(regu_id);
+		if (!strcmp(voltd->priv_id, PWR_REG11_NAME_ID))
+			pwr_regu_id = PWR_REG11;
+		else if (!strcmp(voltd->priv_id, PWR_REG18_NAME_ID))
+			pwr_regu_id = PWR_REG18;
+		else if (!strcmp(voltd->priv_id, PWR_USB33_NAME_ID))
+			pwr_regu_id = PWR_USB33;
+		else
+			break;
+
+		voltd->regulator = stm32mp1_pwr_get_regulator(pwr_regu_id);
 		break;
 	case VOLTD_PMIC:
 		voltd->regulator = stm32mp_pmic_get_regulator(voltd->priv_id);