[feature] Support for setting option bytes to STM32L41x_L42x (according to RM0394)

[ankurraji]

Hi,

I have made a feature request recently (#1412). This pull request adds support for STM32L41x_L42x to set and read option bytes.

I have tested the same with STLink V2 and V3 set on STM32L41x_L42x , and I was able to set/read the option bytes.

Some log flies if required

tester-pi@raspberry:~/Documents/stlink-1.8.0 $ st-flash --area=option read
st-flash 1.8.0
2024-07-10T08:35:19 INFO common.c: STM32L41x_L42x: 40 KiB SRAM, 64 KiB flash in at least 2 KiB pages.
fffff8aa


tester-pi@raspberry:~/Documents/stlink-1.8.0 $ st-flash --area=option write 0xfffff8bb
st-flash 1.8.0
2024-07-10T08:35:22 INFO common.c: STM32L41x_L42x: 40 KiB SRAM, 64 KiB flash in at least 2 KiB pages.
2024-07-10T08:35:22 WARN option_bytes.c: About to write option byte 0xfffff8bb to 0x1fff7800.
2024-07-10T08:35:22 WARN option_bytes.c: Writing option bytes 0xfffff8bb
2024-07-10T08:35:22 INFO option_bytes.c: Wrote 4 option bytes to 0x1fff7800!
2024-07-10T08:35:22 INFO common.c: Go to Thumb mode


tester-pi@raspberry:~/Documents/stlink-1.8.0 $ st-flash --area=option read
st-flash 1.8.0
2024-07-10T08:35:24 INFO common.c: STM32L41x_L42x: 40 KiB SRAM, 64 KiB flash in at least 2 KiB pages.
fffff8bb

Thanks ❤️

(Closes #1405) (Closes #1412)

[ankurraji]

Thanks for the approve and edits 👍