rp2/modutime: time_ns is not part of Pycopy API and not available.
rp2/modutime: time_ns is not part of Pycopy API and not available.

Fixes build error.

Change-Id: I462e87bb832edb14a7d391529dc50b8eb6c57b0f
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython