tests/kernel/mem_pool/mem_pool_api#test_mpool_alloc_timeout crashes on qemu_riscv32

[spoorthik]

The test case test_mpool_alloc_timeout faults on qemu_riscv32.

Execution log:

***** Booting Zephyr OS zephyr-v1.13.0-1017-gc0a6801 *****
Running test suite mpool_api
===================================================================
starting test - test_mpool_alloc_free_thread
PASS - test_mpool_alloc_free_thread
===================================================================
starting test - test_mpool_alloc_free_isr
PASS - test_mpool_alloc_free_isr
===================================================================
starting test - test_mpool_kdefine_extern
PASS - test_mpool_kdefine_extern
===================================================================
starting test - test_mpool_alloc_size
PASS - test_mpool_alloc_size
===================================================================
starting test - test_mpool_alloc_timeout
Exception cause Illegal instruction (2)
Current thread ID = 0x800049dc
Faulting instruction address = 0x8
  ra: 0x0  gp: 0x0  tp: 0x0  t0: 0x0
  t1: 0x0  t2: 0x0  t3: 0x0  t4: 0x0
  t5: 0x0  t6: 0x0  a0: 0x80002158  a1: 0x80004ac8
  a2: 0x0  a3: 0x0  a4: 0x0  a5: 0x80001158
  a6: 0x80  a7: 0x20
Fatal fault in essential thread! Spinning...
PASS - test_mpool_alloc_timeout
===================================================================
starting test - test_sys_heap_mem_pool_assign
PASS - test_sys_heap_mem_pool_assign
===================================================================
===================================================================
PROJECT EXECUTION SUCCESSFUL

Steps to reproduce:

cd tests/kernel/mem_pool/mem_pool_api
mkdir build && cd build
cmake -DBOARD=qemu_riscv32 ..
make run

[nategraff-sifive]

This looks like the exact same failure as in #9777

[andrewboie]

should be fixed by #11962