Fix the 106/109 USB Japanese keyboard "underscore" issue. Sun Type 6 USB keyboard support added in rev 1.46 conflicted with some scan codes used in Japanese keyboards because the scan code conversion routine was ambiguous for the overlapped codes.
Fix the 106/109 USB Japanese keyboard "underscore" issue.
Sun Type 6 USB keyboard support added in rev 1.46 conflicted with
some scan codes used in Japanese keyboards because the scan code
conversion routine was ambiguous for the overlapped codes.

PR:		ports/134005
Submitted by:	YAMASHIRO Jun

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