up_squared(acrn):running tests/kernel/timer/timer_monotonic/ failed

[Zhaoningx]

Describe the bug
running tests/kernel/timer/timer_monotonic/ failed , and assertion failed will be reported.

To Reproduce
Steps to reproduce the behavior:
sanitycheck -p acrn --device-testing --device-serial /dev/ttyUSB0 -T tests/kernel/timer/timer_monotonic/ --west-flash="/home/ztest2/acrn_up2.sh"
see error

*** Booting Zephyr OS build v2.4.0-rc1-19-gd7468bf836b7 ***^M
Running test suite timer_fn^M
===================================================================^M
START - test_timer^M
k_ticks_to_cyc_floor32(1) = 250000^M
sys_clock_hw_cycles_per_sec() = 25000000^M
START - test monotonic timer^M
Testing system tick frequency^M
delta: 79811851 expected: 25000000 319%^M
Clock calibration is way off!^M
Assertion failed at WEST_TOPDIR/zephyr/tests/kernel/timer/timer_monotonic/src/main.c:80: test_timer: (test_frequency() is true)^M
test frequency failed^M
FAIL - test_timer^M
===================================================================^M
Test suite timer_fn failed.^M
===================================================================^M
PROJECT EXECUTION FAILED^M

Environment (please complete the following information):
OS: Fedora28
Toolchain: Zephyr-sdk-0.11.3
Commit ID: d7468bf