net: lib: mqtt_sn_client: net.mqtt_sn.client reports FLASH overflow

[katgiadla]

Describe the bug

Test tests/net/lib/mqtt_sn_client/net.mqtt_sn.client reports FLASH overflow.

Observed for:

• nrf5340dk/nrf5340/cpuapp/ns
• nrf9160dk/nrf9160/ns.

Regression

• This is a regression.

Steps to reproduce

1. go to your zephyr dir
2. call ./scripts/twister -s net.mqtt_sn.client -p nrf9160dk/nrf9160/ns -v --inline-logs --overflow-as-errors
3. See console output with error

Relevant log output

/opt/zephyr-sdk/arm-zephyr-eabi/bin/lib/gcc/arm-zephyr-eabi/12.2.0/arm-zephyr-eabi/bin/ld: bin/bl2.axf section `.text' will not fit in region `FLASH'
/opt/zephyr-sdk/arm-zephyr-eabi/bin/lib/gcc/arm-zephyr-eabi/12.2.0/arm-zephyr-eabi/bin/ld: region `FLASH' overflowed by 1296 bytes
Memory region         Used Size  Region Size  %age Used
           FLASH:       66832 B        64 KB    101.98%
             RAM:       23680 B       512 KB      4.52%
collect2: error: ld returned 1 exit status

Impact

Annoyance – Minor irritation; no significant impact on usability or functionality.

Environment

• OS: Ubuntu 20.04.1 LTS
• Toolchain Zephyr SDK 0.17.0
• Commit SHA or Version used: 0f8b7b7

Additional Context

Bisection indicates for f67be66