trace: rename struct module entry for trace enums

Each module has a list of enum's its contributing to the
enum map, rename that entry to reflect its use by more than
enums.

Link: http://lkml.kernel.org/r/20170531215653.3240-4-jeremy.linton@arm.com



Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>