test: repair test_tickless for ARC because _tsc_read is now present

A _tsc_read has been added for ARC targets.
This test can use that when ARC.

See ZEP-1413

Change-Id: Ib63aecbe9f3eb2b97ad1086fc79b57e8f0774fca
Signed-off-by: Chuck Jordan <cjordan@synopsys.com>
2 files changed