mec15/mec17 : tests/drivers/adc/adc_api/drivers.adc fails

[majunkier]

Describe the bug
There is bug on following platforms :

- mec15xxevb_assy6853/mec1501_hsz
- mec172xevb_assy6906/mec172x_nsz

commit 371ca13c6d2 bring bug

To Reproduce
example run :
west twister -p mec15xxevb_assy6853/mec1501_hsz -s tests/drivers/adc/adc_api/drivers.adc

Logs and console output

twister - DEBUG - DEVICE: E: ***** BUS FAULT *****
twister - DEBUG - DEVICE: E:   Imprecise data bus error
twister - DEBUG - DEVICE: E: r0/a1:  0x00000000  r1/a2:  0x00119730  r2/a3:  0x00119734
twister - DEBUG - DEVICE: E: r3/a4:  0x000e68c3 r12/ip:  0x00000000 r14/lr:  0x000e1c5f
twister - DEBUG - DEVICE: E:  xpsr:  0x61000000
twister - DEBUG - DEVICE: E: Faulting instruction address (r15/pc): 0x000e68ce
twister - DEBUG - DEVICE: E: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0
twister - DEBUG - DEVICE: E: Current thread: 0x118278 (main)
twister - DEBUG - DEVICE: E: Halting system

Environment (please complete the following information):

• OS: Ubuntu 22.04
• Toolchain: zephyr-sdk-0.17.0
• Zephyr version: v4.0.0-2363-g358762b401a2