scsi: fcoe: fix build error

I had a typo in a variable name for the previous patch (SCSI: fcoe:
convert bus code to use bus_group) that broke the build, this fixes
that.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/scsi/fcoe/fcoe_sysfs.c

@@ -558,7 +558,7 @@ static BUS_ATTR(ctlr_destroy, S_IWUSR, NULL, fcoe_ctlr_destroy_store);
 
 static struct attribute *fcoe_bus_attrs[] = {
 	&bus_attr_ctlr_create.attr,
-	&bus_attr_ctrl_destroy.attr,
+	&bus_attr_ctlr_destroy.attr,
 	NULL,
 };
 ATTRIBUTE_GROUPS(fcoe_bus);