replace nano_tick_get_32 with sys_tick_get_32

The calls have been renamed and some drivers and documentation
are still using the old function name.

Change-Id: Ib7505fca6aadd68e3ea3a22bb445914c3eb6ed7f
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
2 files changed