ipq806x: fix ipq8065 s2a/s2b regulator frequency (fixes ethernet performance)

Signed-off-by: Roman Yeryomin <roman@advem.lv>

target/linux/ipq806x/patches-4.4/168-ARM-qcom-add-smb208-DT.patch

@@ -127,7 +127,7 @@ Signed-off-by: Adrian Panella <ianchi74@outlook.com>
 -			smb208_s2b: smb208-s2b {
 -				compatible = "qcom,rpm-smb208";
 -				reg = <QCOM_RPM_SMB208_S2b>;
-+					qcom,switch-mode-frequency = <1400000>;
++					qcom,switch-mode-frequency = <1200000>;
 +				};
  
 -				regulator-min-microvolt = < 800000>;
@@ -137,7 +137,7 @@ Signed-off-by: Adrian Panella <ianchi74@outlook.com>
 +					regulator-max-microvolt = <1275000>;
  
 -				qcom,switch-mode-frequency = <1400000>;
-+					qcom,switch-mode-frequency = <1400000>;
++					qcom,switch-mode-frequency = <1200000>;
 +				};
  			};