brlapi: Fix documentation for value returned by brlapi_getDriverName/ModelIdentifier
brlapi: Fix documentation for value returned by brlapi_getDriverName/ModelIdentifier

Reported-by: Mario Lang <32998a7469fd57c844fc7013189bc75964574a07@blind.guru>

brltty/brltty,brltty/brltty,brltty/brltty,brltty/brltty,brltty/brltty,brltty/brltty