PCI/MSI: Rename "struct msi_chip" to "struct msi_controller"

"msi_chip" isn't very descriptive, so rename it to "msi_controller".  That
tells a little more about what it does and is already used in device tree
bindings.

No functional change.

[bhelgaas: changelog, change *only* the struct name so it's reviewable]
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/include/linux/msi.h b/include/linux/msi.h
index efad127..6704991 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -65,15 +65,15 @@
 void default_teardown_msi_irqs(struct pci_dev *dev);
 void default_restore_msi_irqs(struct pci_dev *dev);
 
-struct msi_chip {
+struct msi_controller {
 	struct module *owner;
 	struct device *dev;
 	struct device_node *of_node;
 	struct list_head list;
 
-	int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev,
+	int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev,
 			 struct msi_desc *desc);
-	void (*teardown_irq)(struct msi_chip *chip, unsigned int irq);
+	void (*teardown_irq)(struct msi_controller *chip, unsigned int irq);
 };
 
 #endif /* LINUX_MSI_H */