[PATCH 5/5] ACPI: Replace irqdomain.h include with struct declarations

linux/acpi.h includes irqdomain.h which includes of.h. Break the include
chain by replacing the irqdomain include with forward declarations for
struct irq_domain and irq_domain_ops which is sufficient for acpi.h.

Cc: Marc Zyngier <maz@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
---
 include/linux/acpi.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index efff750f326d..169c17c0b0dc 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h

@@ -10,12 +10,14 @@
 
 #include <linux/errno.h>
 #include <linux/ioport.h>	/* for struct resource */
-#include <linux/irqdomain.h>
 #include <linux/resource_ext.h>
 #include <linux/device.h>
 #include <linux/property.h>
 #include <linux/uuid.h>
 
+struct irq_domain;
+struct irq_domain_ops;
+
 #ifndef _LINUX
 #define _LINUX
 #endif

-- 
2.39.2