zephyr: stm32: Shell module sample doesn't work on nucleo_l152re

Shell module sample doesn’t work on nucleo_l152re with latest Zephyr.

$ west build -p auto -b nucleo_l152re zephyr/samples/subsys/shell/shell_module
$ west flash

[00:00:00.000,000] <err> os: ***** MPU FAULT *****
[00:00:00.000,000] <err> os:   Instruction Access Violation
[00:00:00.000,000] <err> os: r0/a1:  0x00000000  r1/a2:  0x20000580  r2/a3:  0x00000000
[00:00:00.000,000] <err> os: r3/a4:  0x00000000 r12/ip:  0xaaaaaaaa r14/lr:  0xfffffffd
[00:00:00.000,000] <err> os:  xpsr:  0x61000036
[00:00:00.000,000] <err> os: Faulting instruction address (r15/pc): 0xe7ecfc56
[00:00:00.001,000] <err> os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0
[00:00:00.001,000] <err> os: Fault during interrupt handling

[00:00:00.001,000] <err> os: Current thread: 0x200005d0 (idle)
[00:00:00.070,000] <err> os: Halting system

Environment

• OS: Debian GNU/Linux 10 amd64
• Toolchain: zephyr-sdk 0.10.3
• Commit SHA: 68a235932f93c432638d94a641f923f1210e992f