tracing: change owner name to driver name for devlink hwmsg tracepoint

Turned on that driver->owner which is struct module is not available when
modules are disabled. Better to depend on a driver name which is
always available.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Fixes: e5224f0f

 ("devlink: add hardware messages tracing facility")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: David S. Miller <davem@davemloft.net>