Protect the kernel version space from redefinition.

vboot_firmware/stub/tlcl.c

Index: vboot_firmware/stub/tlcl.c
diff --git a/vboot_firmware/stub/tlcl.c b/vboot_firmware/stub/tlcl.c
index 6d1cf5b18ef7d3ab09f4127e1c68966601f42f66..23f0f09ad3575c60c4fdf766fd82db0d0fd1243e 100644
--- a/vboot_firmware/stub/tlcl.c
+++ b/vboot_firmware/stub/tlcl.c
@@ -33,3 +33,6 @@ uint32_t TlclSetGlobalLock(void) { return TPM_SUCCESS; }
 uint32_t TlclGetFlags(uint8_t* disable, uint8_t* deactivated) {
   return TPM_SUCCESS;
 }
+uint32_t TlclGetPermissions(uint32_t index, uint32_t* permissions) {
+  return TPM_SUCCESS;
+}