Reorganization of time calculating macros

Move time calculation macros from application directory to kernel
directory, since it is used by a kernel component.
In order to follow namespace and naming conventions, convert
macros to SYS_CLOCK_HW_CYCLES_TO_NS* form.

Change-Id: I96e9149c399adc363aed5095ae82a1abc78d2977
Signed-off-by: Dmitriy Korovkin <dmitriy.korovkin@windriver.com>
26 files changed