intel_adsp_cavs15: run interrupt testcases failed on ADSP

[KangJianX]

Describe the bug
run tests/kernel/interrupt/ failed on ADSP

To Reproduce
Steps to reproduce the behavior:

1. twister -p intel_adsp_cavs15 --device-testing -T tests/kernel/interrupt/ --west-flash="/home/ztest/work/zephyrproject/zephyr/boards/xtensa/intel_adsp_cavs15/tools/flash.sh,/home/ztest/work/zephyrproject/modules/audio/sof/keys/otc_private_key.pem,/home/ztest/work/rimage/config,/home/ztest/work/rimage/build/rimage" --device-serial-pty="/home/ztest/work/zephyrproject/zephyr/boards/xtensa/intel_adsp_cavs15/tools/adsplog.py,--no-history"

Logs and console output

DEBUG - DEVICE: ===================================================================
DEBUG - DEVICE: START - test_isr_offload_job_multiple
DEBUG - DEVICE: case 0
DEBUG - DEVICE: case 0
DEBUG - DEVICE:
DEBUG - DEVICE: ASSERTION FAIL [work->queue != ((void *)0)] @ WEST_TOPDIR/zephyr/kernel/work.c:334
DEBUG - DEVICE: @ WEST_TOPDIR/zephyr/lib/os/assert.c:45

Environment (please complete the following information):
OS: Fedora28
Toolchain: Zephyr-sdk-0.12.4
Commit id: 929c573