regulator: fix simple_return.cocci warnings

Simplify a trivial if-return sequence and combine with a
preceding function call.

Generated by: scripts/coccinelle/misc/simple_return.cocci

CC: Mark Brown <broonie@kernel.org>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/qcom_spmi-regulator.c

@@ -710,12 +710,8 @@ static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev,
 	if (range_sel == 1)
 		voltage_sel |= ULT_SMPS_RANGE_SPLIT;
 
-	ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET,
+	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET,
 	       voltage_sel, 0xff);
-	if (ret)
-		return ret;
-
-	return 0;
 }
 
 static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev)