boards: nrf52_blenano2: Add i2c's to nrf52_blenano2 board dts.
boards: nrf52_blenano2: Add i2c's to nrf52_blenano2 board dts.

Fixes #8391

Enables the i2c drivers for these boards.
Required to enable i2c with these boards.
Tested samples/sensor/tmp112 for nrf52_blenano2
with i2c enabled.

Signed-off-by: Mandar Chandrakant Thorat <0c0979c1ae50d4c9f4508ffcd142529bf0b4cc41@intel.com>

Vudentz/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,nashif/zephyr,ldts/zephyr,kraj/zephyr,nashif/zephyr,nashif/zephyr,explora26/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,ldts/zephyr,kraj/zephyr,galak/zephyr,nashif/zephyr,finikorg/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,kraj/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,explora26/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,ldts/zephyr,kraj/zephyr,galak/zephyr,Vudentz/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,explora26/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,Vudentz/zephyr,punitvara/zephyr