Add description about command that read TPM_PERMANENT_FLAGS.

Signed-off-by:Xiaokai Wang <xiaokai.wang@intel.com>

diff --git a/man/man8/tpm_nvinfo.pod b/man/man8/tpm_nvinfo.pod
index 724f5be..c5b4d79 100644
--- a/man/man8/tpm_nvinfo.pod
+++ b/man/man8/tpm_nvinfo.pod
@@ -8,10 +8,13 @@ B<tpm_nvinfo [OPTIONS]>
 
 =head1 DESCRIPTION
 
-B<tpm_nvinfo> displays information about defined NVRAM areas. The user may
-restrict it to display only a single NVRAM area by providing an index or may
-choose ton only list available NVRAM areas indices without displaying the
-NVRAM areas' detailed information.
+B<tpm_nvinfo> displays information about defined NVRAM areas and TPM_PERMANENT_FLAGS.
+The user may restrict it to display only a single NVRAM area by providing an index or
+may choose ton only list available NVRAM areas indices without displaying the NVRAM
+areas' detailed information.
+
+Owner authentication is necessary if wanting to display  the TPM_PERMANENT_FLAGS
+The owner password may be provided on the command line using the owner password option.
 
 The following options are supported:
 
@@ -38,6 +41,18 @@ provided all NVRAM areas will be displayed.
 
 Only display the defined NVRAM areas' indices.
 
+=item B<-f, --flags> (optional parameter)
+
+Displays TPM_PERMANENT_FLAGS.
+
+=item B<-o, --pwdo> (optional parameter)
+
+The owner password.
+
+A password may be directly provided for example by using '--pwdo=password' or
+'-opassword'. If no password is provided with this option then the program will
+prompt the user for the password.
+
 =back
 
 =head1 SEE ALSO