Fixed and enhanced Edirol SD-90 IDF

Current SD-90 IDF does not have LSB set for bank select for any of the
patches, so selection among variation does not work.

This version also reorganizes the patch groups so that it is more
ergonomic and consistent with other GM2 derived instruments. Patches are
grouped by instrument type and then variations from all 4 sets are
included in that group sorted by PC and then set (Classic, Contemporary,
Solo, Enhanced). This keeps the related variations close together.

The drum sets are added per IDF 2.1 format.
Controller definitions updated.