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.
GPS drivers.
Update GPS parser.

Timeouts and cleaner inner-workings.
Does not hang in case of dead gps chip.
Update demo application to use one second interval.