This is the password input mode. When input as pskKeyModePassPhrase,
h3cDot11SrvSecurityPskKeyString must be 8 to 63 characters;
when input as pskKeyModeRawKey, h3cDot11SrvSecurityPskKeyString
must be 64 characters and each character must be '0'-'9', 'a'-'f' and
'A'-'F'.