ARM: dts: exynos: remove unneeded DVS voltages from PMIC on Arndale

The S5M8767 PMIC does not require anymore a safe DVS voltage, if the DVS
GPIO is not enabled.  Although previously bindings required providing
this safe DVS voltage, but since commit 04f9f068 ("regulator:
s5m8767: Modify parsing method of the voltage table of buck2/3/4") this
was ignored.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210928084949.27939-12-krzysztof.kozlowski@canonical.com

arch/arm/boot/dts/exynos5250-arndale.dts

@@ -240,9 +240,6 @@ pmic@66 {
 		vinl8-supply = <&buck8_reg>;
 		vinl9-supply = <&buck8_reg>;
 
-		s5m8767,pmic-buck2-dvs-voltage = <1300000>;
-		s5m8767,pmic-buck3-dvs-voltage = <1100000>;
-		s5m8767,pmic-buck4-dvs-voltage = <1200000>;
 		s5m8767,pmic-buck-dvs-gpios = <&gpd1 0 GPIO_ACTIVE_HIGH>,
 					      <&gpd1 1 GPIO_ACTIVE_HIGH>,
 					      <&gpd1 2 GPIO_ACTIVE_HIGH>;