VOUT4_1V8 not enabled - Setting up I2C3 on Hikey970

I am currently trying to bringup the i2c3 on the hikey970 but apparently the voltage that is used for pulling up the sda and scl pin VOUT4_1V8 is not enabled.

Is there a trick on how to enable this voltage and how to use the i2c3 on the hikey970?

thanks in advance