The function which handles the "Boot####", "BootOrder" ...
may return failure. This patch adds the error handling codes.
return the failure info to browser.
Cc: Laszlo Ersek <lersek@redhat.com> 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>