dev-arm: Allow IOMMU binding to HDLcd

Change-Id: I894080e7bd76e7efedef141c937e1561c0c0527c
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Ciro Santilli <ciro.santilli@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/20841
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

src/dev/arm/RealView.py

@@ -506,6 +506,8 @@ class HDLcd(AmbaDmaDevice):
         # See the driver for more information.
         node.append(FdtPropertyStrings("status", ["disabled"]))
 
+        self.addIommuProperty(state, node)
+
         yield node
 
 class RealView(Platform):