This provides time and sleep together with the usual ticks_us/_ms/_diff
and sleep_us/ms family.
We also provide access to Zephyr's high precision timer as ticks_cpu().
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
The boot issue text mentions a help() function and encourages
the user to run it. It is very disconcerting to find that the
function does not exist...
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>