tests: zephyr: boards: nrf: hwinfo: enable for LM20 DK

LM20 DK.

Signed-off-by: Piotr Kosycarz <[email protected]>

Author: nordic-piks

tests/zephyr/boards/nrf/hwinfo/reset_cause/testcase.yaml

@@ -38,6 +38,7 @@ tests:
     platform_allow:
       - nrf54l09pdk/nrf54l09/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
       - nrf54lv10apdk/nrf54lv10a/cpuapp
       - nrf7120pdk/nrf7120/cpuapp
     integration_platforms: