gsd4e_v2: clone from org4472.  For M10478 chips (GSD4e-9333).

- Initial clone.  Still needs to be tweaked for current chips which
  behave differently than the older org4472 gsd4e chips.
exp5438_gps: switch over to gsd4e_v2 implementation
org4472: update comments to reflect existence of the M10478
org4472: switch to decimal time