platform-msi: Fix typos in comment

Fix up one typos @nev -> @nr_irqs.
Signed-off-by: NShaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: NMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1589770859-19340-1-git-send-email-zhangshaokun@hisilicon.com

drivers/base/platform-msi.c

@@ -387,7 +387,7 @@ void platform_msi_domain_free(struct irq_domain *domain, unsigned int virq,
  *
  * @domain:	The platform-msi domain
  * @virq:	The base irq from which to perform the allocate operation
- * @nvec:	How many interrupts to free from @virq
+ * @nr_irqs:	How many interrupts to free from @virq
  *
  * Return 0 on success, or an error code on failure. Must be called
  * with irq_domain_mutex held (which can only be done as part of a