ARM: dts: imx6: RDU2: bump SoC/PU operating points by 25mV

This bumps the SoC/PU domain operating points by 25mV, giving a total
of 75mV margin to the minimum required voltages. This gets rid of
brown-outs seen due to voltage drop-out on the board.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi

@@ -263,6 +263,17 @@ edp_refclk: edp-refclk {
 	};
 };
 
+&cpu0 {
+	fsl,soc-operating-points = <
+		/* ARM kHz  SOC-PU uV */
+		1200000 1300000
+		996000	1275000
+		852000	1275000
+		792000	1200000
+		396000	1200000
+	>;
+};
+
 &reg_arm {
 	vin-supply = <&sw1a_reg>;
 };