idle: add support for nanokernel tickless idle

The architectures need to add support for it in their nano_cpu_idle()
and nano_cpu_atomic_idle() implementations, as well as in their
interrupt entry and exit code.

Change-Id: I44a241c56e624dc8e32e08db29a84489314cd7a4
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
1 file changed