Don't trace packets unless CCW tracing/stepping enabled:

Enabling the debug(*) option for an LCS device should only enable debug/status type messages (indicating what the module is currently or about to do), but should otherwise not trace the I/O.  Only enabling CCW tracing/stepping on the device (via the 't+' panel command) should cause the actual packets to be traced.

(*) Either via the -d device statement option or via the 'ctc' panel command.