Raise log level for unknown button maps to DBG_INFO_L2
Raise log level for unknown button maps to DBG_INFO_L2

Prevents confusing logs for devices which aren't and shouldn't handled by this function.
dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin