Fix JTAG pin mappings
Implementing basic power-domain api

Usage:
	power_request(domain)  to enable specific power domain.
	power_release(domain)  to release power domain.

Keeps count of power domain users and set power to zero(disabled)
when there is no users anymore.

Domains in RuuviC2:
	LDO2, LDO3, LDO3, GSM
Setup system clock to 168Mhz
Disable unused UART1
GPS handler test.

Basic gps parser thread and simple API to query gps information.