[PATCH 2/3] docs: Document <address/> for IOMMU device

[Michal Privoznik]

The commit v8.3.0-rc1~199 introduced <address/> to <iommu/>
device. And while it updated the RNG it forgot to update the
docs. Fix that.

Fixes: b0eb1e193f5db033d0fbbf91ff71a121066ad77c
Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
 docs/formatdomain.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst
index 62a94890f0..a4e3c39928 100644
--- a/docs/formatdomain.rst
+++ b/docs/formatdomain.rst
@@ -8083,6 +8083,9 @@ Example:
       mapping larger iova addresses in the guest. :since:`Since 6.5.0` (QEMU/KVM
       only)
 
+The ``virtio`` IOMMU devices can further have ``address`` element as described
+in `Device addresses`_ (address has to by type of ``pci``).
+
 
 Vsock
 ~~~~~
-- 
2.35.1