[flxcard] flx-init: fix FireFly reset function; FlxCard: add i2c_write()...
[flxcard] flx-init: fix FireFly reset function; FlxCard: add i2c_write() function for n-byte register (support for 2-byte INA226 registers)
[flxcard] flx-init: fix FireFly reset function; FlxCard: add i2c_write() function for n-byte register (support for 2-byte INA226 registers)