NetworkPkg/IScsiDxe: add horizontal whitespace to IScsiCHAP files
    
    In the next patches, we'll need more room for various macro and parameter
    names. For maintaining the current visual alignments, insert some
    horizontal whitespace in preparation. "git show -b" produces no output for
    this patch; the patch introduces no functional changes.
    
    Cc: Jiaxin Wu <jiaxin.wu@intel.com>
    Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com>
    Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
    Cc: Siyuan Fu <siyuan.fu@intel.com>
    Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3355
    Signed-off-by: Laszlo Ersek <lersek@redhat.com>
    Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
    Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com>