irqdomain: Added domain bus token DOMAIN_BUS_FSL_MC_MSI

Since an FSL-MC bus is a new bus type that is neither PCI nor
PLATFORM, we need a new domain bus token to disambiguate the
IRQ domain for FSL-MC MSIs.
Signed-off-by: NJ. German Rivera <German.Rivera@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/irqdomain.h

@@ -74,6 +74,7 @@ enum irq_domain_bus_token {
 	DOMAIN_BUS_PCI_MSI,
 	DOMAIN_BUS_PLATFORM_MSI,
 	DOMAIN_BUS_NEXUS,
+	DOMAIN_BUS_FSL_MC_MSI,
 };
 
 /**