hw/bus: Add I2C bus driver for da1469x
hw/bus: Add I2C bus driver for da1469x

This adds I2C bus driver which can be used with da1469x MCUs
instead of default i2c_hal driver.

This driver uses inetrrupts and DMA instead of busy loops used
in i2c_hal driver.

mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core