net: sched: Fill in MODULE_DESCRIPTION for act_gate

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().

Gate is the only TC action that is lacking such description.
Fill MODULE_DESCRIPTION for Gate TC ACTION.

Signed-off-by: Victor Nogueira <[e-mail]>
Acked-by: Jamal Hadi Salim <[e-mail]>
Reviewed-by: Vinicius Costa Gomes <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

net/sched/act_gate.c

···
 
 module_init(gate_init_module);
 module_exit(gate_cleanup_module);
+MODULE_DESCRIPTION("TC gate action");
 MODULE_LICENSE("GPL v2");