netconsole: fix sysdata_release_enabled_show checking wrong flag

sysdata_release_enabled_show() checks SYSDATA_TASKNAME instead of
SYSDATA_RELEASE, causing the configfs release_enabled attribute to
reflect the taskname feature state rather than the release feature
state. This is a copy-paste error from the adjacent
sysdata_taskname_enabled_show() function.

The corresponding _store function already uses the correct
SYSDATA_RELEASE flag.

Fixes: 343f90227070 ("netconsole: implement configfs for release_enabled")
Signed-off-by: Breno Leitao <[e-mail]>
Cc: [e-mail]
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/netconsole.c

···
 	bool release_enabled;
 
 	dynamic_netconsole_mutex_lock();
-	release_enabled = !!(nt->sysdata_fields & SYSDATA_TASKNAME);
+	release_enabled = !!(nt->sysdata_fields & SYSDATA_RELEASE);
 	dynamic_netconsole_mutex_unlock();
 
 	return sysfs_emit(buf, "%d\n", release_enabled);