icE1usb fw/gpsdo: Export accumulated error

This is a pretty usefu stat as this is what actually matters

Note that structure is just extended so any call with a wLength
shorter will just get the beginning of the struct (usb stack
limits response to wLength) and thus is fully backward compatible.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: I0aa919d4870ca7e1b653b82ac4f76ed26b5e3b08
2 files changed