The SBI spec is frozen now. Update the headers to reflect that.

Signed-off-by: Atish Patra <[email protected]>

riscv-sbi.adoc

@@ -4,7 +4,7 @@
 :company: RISC-V.org
 // Pull in variable with revision info
 include::autogenerated/revision.adoc-snippet[]
-:revremark: This document is stable. Assume anything could still change, but limited change should be expected. Visit http://riscv.org/spec-state for further details.
+:revremark: This document is Frozen. Change is extremely unlikely. A high threshold will be used, and a change will only occur because of some truly critical issue being identified during the public review cycle. Any other desired or needed changes can be the subject of a follow-on new extension. Visit http://riscv.org/spec-state for further details.
 :url-riscv: http://riscv.org
 :doctype: book
 :preface-title: Preamble
@@ -38,10 +38,12 @@ endif::[]
 
 // Preamble
 [WARNING]
-.This document is in the link:http://riscv.org/spec-state[Stable state]
+.This document is in the link:http://riscv.org/spec-state[Frozen state]
 ====
-Assume everything can still change but limited change should be expected and 
-backward compatibility with previously ratified specification will be maintained. 
+Change is extremely unlikely. A high threshold will be used, and a change will
+only occur because of some truly critical issue being identified during the
+public review cycle. Any other desired or needed changes can be the subject of
+a follow-on new extension.
 
 ====
 

src/changelog.adoc

@@ -1,5 +1,8 @@
 == Change Log
 
+=== Version 2.0-rc5
+* Update the document state to Frozen
+
 === Version 2.0-rc4
 * Added flags parameter to sbi_pmu_snapshot_set_shmem()
 * Return error code SBI_ERR_NO_SHMEM in SBI PMU extension wherever applicable