Rasclock (PCF2127 ) Hardware Clock FreeBSD 12.0

[Stefan Parvu]

> 
> Hmm. I could test first this one. I could set and fix the time. The power off
> the thing for coupld of hours or until morning and then plug it back to my
> board and check if there is any difference. thats a good point.
> 

RTC disconnect / re-connect after 5hrs - the RTC has been unplugged from the board
for 5hrs+. After I reconnect the RTC to the board, power on the system I can see that
the time is correctly retrieved from the RTC. 

$ dmesg | grep nxp
nxprtc0: <NXP PCF2129 RTC> at addr 0xa2 on iicbus0
nxprtc0: registered as a time-of-day clock, resolution 0.015625s

So, I can repeat this test to real make sure this is consistent. But something is making the
RTC device to lose time when is installed on the board.

Stefan