feat(linux): Update 12.00.00.00 Release Notes for security

Update Release_Specific_Release_Notes.rst to include security specific
updates on AM62X, AM62PX, AM62LX and AM64X in 12.00.00.00 release.
Minor indentation correction in AM64X rst.

Signed-off-by: Shiva Tripathi <s-tripathi1@ti.com>

Author: shiva-ti

source/devices/AM62LX/linux/Release_Specific_Release_Notes.rst

@@ -52,6 +52,10 @@ What's new
   - Important Bug Fixes on top of Processor SDK 11.02.08.02 Release.
   - Review Issue Tracker Section for the new fixes.
   - Support for multiple Linux distributions, such as Yocto, Debian and Buildroot
+  - OPTEE: Hardware-backed secure key storage via RPMB with PKCS#11 interface
+  - Security: ATF, OPTEE and RNG memory firewall for isolation from Linux
+  - Security: Yocto reference for LUKS2 root filesystem encryption with fTPM key management
+  - Secure boot: Support for U-boot FIT image signing and verification
 
 **Key Release References:**
 

source/devices/AM62PX/linux/Release_Specific_Release_Notes.rst

@@ -51,6 +51,8 @@ What's new
   - First 2026 LTS Reference Release Including RT combined branch model
   - Important Bug Fixes on top of Processor SDK 11.02.08.02 Release.
   - Review Issue Tracker Section for the new fixes.
+  - Security: ATF and OPTEE memory firewall for isolation from Linux
+  - Security: Yocto reference for LUKS2 root filesystem encryption with fTPM key management
 
 **Key Release References:**
 

source/devices/AM62X/linux/Release_Specific_Release_Notes.rst

@@ -48,6 +48,8 @@ What's new
   - First 2026 LTS Reference Release Including RT combined branch model
   - Important Bug Fixes on top of Processor SDK 11.02.08.02 Release
   - Review Issue Tracker Section for the new fixes.
+  - Security: ATF and OPTEE memory firewall for isolation from Linux
+  - Security: Yocto reference for LUKS2 root filesystem encryption with fTPM key management
 
 **Key Release References:**
 

source/devices/AM64X/linux/Release_Specific_Release_Notes.rst

@@ -46,9 +46,10 @@ What's new
 
 **Processor SDK Linux AM64X Release has following new features:**
 
-- First 2026 LTS Reference Release Including RT combined branch model
+  - First 2026 LTS Reference Release Including RT combined branch model
   - Important Bug Fixes on top of Processor SDK 11.02.08.02 Release
   - Review Issue Tracker Section for the new fixes.
+  - Security: ATF and OPTEE memory firewall for isolation from Linux
 
 **Key Release References:**