v0.2.1: Dev (#23)

* Add pin sense & drive strength to gpio pin configuration
Combine to single iopinctrl for nRF5x serie (including nRF52840 with multiport gpio)

* More comments

* Comments

* Fixes compile errors LPC17xx
Updated iopinctrl for LPC17xx

* Add restart condition for compatibility with LPC MCU

* Fixes LPC17xx I2C interface