ARM: dts: imx6q: update setting of VDDARM_CAP voltage

According to datasheet, VDD_CACHE_CAP must not exceed VDDARM_CAP
by more than 200mV, as all of i.MX6Q boards' VDD_CACHE_CAP currently
are connected to VDDSOC_CAP, so we need to follow this rule by
increasing VDDARM_CAP's voltage.
Signed-off-by: NAnson Huang <b20788@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6q.dtsi

@@ -27,7 +27,7 @@
 				1200000 1275000
 				996000  1250000
 				792000  1150000
-				396000  950000
+				396000  975000
 			>;
 			clock-latency = <61036>; /* two CLK32 periods */
 			clocks = <&clks 104>, <&clks 6>, <&clks 16>,