[PATCH v2] SUPPORT: downgrade Physical CPU Hotplug to Experimental

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

From: Stefano Stabellini <stefano.stabellini@xxxxxxx>

The feature is not commonly used, and we don't have hardware to test it,
not in OSSTest, not in Gitlab, and not even ad-hoc manually by community
members. We could use QEMU to test it, but even that it is known not to
work.

Also take the opportunity to rename the feature to "ACPI CPU Hotplug"
for clarity.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx>
---
Changes in v2:
- rename the feature following Roger's suggestion
---
 SUPPORT.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/SUPPORT.md b/SUPPORT.md
index 3461f5cf2f..3472b6edfa 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -46,9 +46,9 @@ For the Cortex A77 r0p0 - r1p0, see Errata 1508412.
 
 ## Host hardware support
 
-### Physical CPU Hotplug
+### ACPI CPU Hotplug
 
-    Status, x86: Supported
+    Status, x86: Experimental
 
 ### Physical Memory
 
-- 
2.25.1