Joxer: reduce battery I2C frequency to 50 kHz
Follow CL:3721954 to reduce battery I2C frquency.
BRANCH=none
TEST=make sure EC can read battery info and battery can be charged.
&i2c1 {
label = "I2C_BATTERY";
- clock-frequency = <I2C_BITRATE_STANDARD>;
+ clock-frequency = <50000>;
pinctrl-0 = <&i2c1_clk_gpc1_default
&i2c1_data_gpc2_default>;
pinctrl-names = "default";
