genirq/irqdomain: Add DOMAIN_BUS_DEVICE_MSI

Add a new domain bus token to prepare for device MSI which aims to replace
the existing platform MSI maze.

Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: KAGA-KOKO

include/linux/irqdomain_defs.h

@@ -26,6 +26,7 @@ enum irq_domain_bus_token {
 	DOMAIN_BUS_DMAR,
 	DOMAIN_BUS_AMDVI,
 	DOMAIN_BUS_PCI_DEVICE_IMS,
+	DOMAIN_BUS_DEVICE_MSI,
 };
 
 #endif /* _LINUX_IRQDOMAIN_DEFS_H */