timer: Rename _sys_clock_cycle_get()

Renames _sys_clock_cycle_get() (provided by the timer driver)
to sys_cycle_get_32().  It is the preferred method to read the
hardware clock.

Change-Id: Ifea5213d8c04a8bf7b9114b048c5db0ccee61549
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
13 files changed