umd: open source compiler code

Release DLA1.2.0 compiler source code

Signed-off-by: Prashant Gaikwad <[email protected]>
Signed-off-by: Mitch Harwell <[email protected]>
Signed-off-by: Gunjan Mehta <[email protected]>
Signed-off-by: Ken Adams <[email protected]>
Signed-off-by: Arvind M <[email protected]>

doc: add compiler features and LP support doc

Signed-off-by: Prashant Gaikwad <[email protected]>