genirq/msi: Make __msi_domain_free_irqs() static

Now that the last user is gone, confine it to the core code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ashok Raj <ashok.raj@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20221111122014.179595843@linutronix.de

include/linux/msi.h

@@ -335,9 +335,6 @@ struct msi_domain_info;
  * are set to the default implementation if NULL and even when
  * MSI_FLAG_USE_DEF_DOM_OPS is not set to avoid breaking existing users and
  * because these callbacks are obviously mandatory.
- *
- * __msi_domain_free_irqs() is exposed for PPC pseries to handle extra
- * work after all interrupts and descriptors have been freed.
  */
 struct msi_domain_ops {
 	irq_hw_number_t	(*get_hwirq)(struct msi_domain_info *info,
@@ -432,7 +429,6 @@ int msi_domain_alloc_irqs_descs_locked(struct irq_domain *domain, struct device
 				       int nvec);
 int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
 			  int nvec);
-void __msi_domain_free_irqs(struct irq_domain *domain, struct device *dev);
 void msi_domain_free_irqs_descs_locked(struct irq_domain *domain, struct device *dev);
 void msi_domain_free_irqs(struct irq_domain *domain, struct device *dev);
 struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);

kernel/irq/msi.c

@@ -463,6 +463,7 @@ static inline void msi_sysfs_remove_desc(struct device *dev, struct msi_desc *de
 
 #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
 static int __msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev, int nvec);
+static void __msi_domain_free_irqs(struct irq_domain *domain, struct device *dev);
 
 static inline void irq_chip_write_msi_msg(struct irq_data *data,
 					  struct msi_msg *msg)
@@ -978,7 +979,7 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev, int nve
 	return ret;
 }
 
-void __msi_domain_free_irqs(struct irq_domain *domain, struct device *dev)
+static void __msi_domain_free_irqs(struct irq_domain *domain, struct device *dev)
 {
 	struct msi_domain_info *info = domain->host_data;
 	struct irq_data *irqd;