Vlv2TbltDevicePkg: Remove non ASCII characters from source files

Remove non-ASCII characters from comments in source files.  These
are preventing the build tool from generating report files on
Linux systems.

Cc: Zailiang Sun <zailiang.sun@intel.com>
Cc: Yi Qian <yi.qian@intel.com>
Cc: Gary Lin <glin@suse.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Zailiang Sun <zailiang.sun@intel.com>
Reviewed-by: Gary Lin <glin@suse.com>