arch/arm/boot/dts/msm8974.dtsi: set other i2c clocks to 19.2 MHz as well

https://github.com/Team-CodeCraft/m8-gpe/commit/640811331d17c717eae785a1ac75cac992f46d3e#diff-b67083b4967a87b3eb2971190d76f521R923