[xen staging] CHANGELOG.md: Glean some information from SUPPORT.md

[patchbot@xxxxxxx]

commit e4bdcc8aef6707027168ea29caed844a7da67b4d
Author:     Ian Jackson <iwj@xxxxxxxxxxxxxx>
AuthorDate: Tue Mar 9 14:39:21 2021 +0000
Commit:     Ian Jackson <iwj@xxxxxxxxxxxxxx>
CommitDate: Wed Mar 10 16:13:48 2021 +0000

    CHANGELOG.md: Glean some information from SUPPORT.md
    
    Signed-off-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>
    Release-Acked-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>
---
 CHANGELOG.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6805f9b7d4..c407f6bb2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,17 @@ The format is based on [Keep a 
Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ## [4.15.0 
UNRELEASED](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.15.0)
 - TBD
 
+## Added / support upgraded
+ - ARM IOREQ servers (device emulation etc.) (Tech Preview)
+ - Renesas IPMMU-VMSA (Supported, not security supported; was Tech Preview)
+ - ARM SMMUv3 (Tech Preview)
+
+## Removed / support downgraded
+
+ - qemu-xen-traditional as host process device model, now "No security
+   support, not recommended".  (Use as stub domain device model is still
+   supported - see SUPPORT.md.)
+
 ## 
[4.14.0](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.14.0) 
- 2020-07-23
 
 ### Added
--
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