Documentation/kernel-parameters: Add tsa under mitigations=off

On X86 AMD systems, mitigations=off also disables the Transient
Scheduler Attacks (TSA) mitigation. Add it to the list.

Signed-off-by: Yu Liao <liaoyu.ly@bytedance.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251225121438.38427-1-liaoyu.ly@bytedance.com>

Author: Yu Liao

Documentation/admin-guide/kernel-parameters.txt

@@ -3998,6 +3998,7 @@ Kernel parameters
 					       spectre_v2_user=off [X86]
 					       srbds=off [X86,INTEL]
 					       ssbd=force-off [ARM64]
+					       tsa=off [X86,AMD]
 					       tsx_async_abort=off [X86]
 					       vmscape=off [X86]