This patch is to fix the incorrect logic when handling the "&READONLY" tag in <KeywordResp>. 1. In UEFI spec, the "&READONLY" tag is in upper case, but using the lower case in current codes by mistake. 2. The logic in checking the ReadOnly flag is not correct. Whether having "&READONLY" tag must be consistent with the result of "ExtractReadOnlyFromOpCode" function. Cc: Liming Gao <liming.gao@intel.com> Cc: Eric Dong <eric.dong@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>