arch/x86/pirq_routing.c: Drop unneeded `continue`

Change-Id: I714247da261d4dd1b6a722436d71404f9862e958
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44178
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/arch/x86/pirq_routing.c

@@ -106,8 +106,6 @@ static u8 pirq_get_next_free_irq(u8 *pirq, u16 bitmap)
 		/* If it's not yet routed, use it */
 		if (!already_routed)
 			break;
-		/* But if it was already routed, try the next one */
-		continue;
 	}
 	/* Now we got our IRQ */
 	return irq;