scripts/coccinelle/misc/irqf_oneshot.cocci: Fix grammar

Correct form is 'always requested'.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>

scripts/coccinelle/misc/irqf_oneshot.cocci

-/// Make sure threaded IRQs without a primary handler are always request with
+/// Make sure threaded IRQs without a primary handler are always requested with
 /// IRQF_ONESHOT
 ///
 //