icE1usb fw: Add access functions for the 'time' hardware

The hardware has a tick counter (constantly incremented every
cycle) and a pps counter (which is the tick counter captured
at the pps edge).

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: I2122ea3d636c8a430c6eb945b0c11e26e02fee43
2 files changed