Revert "OMAPDSS: DSI: Enable DSI and DISPC configuration from board file"

This reverts commit ee23ff559772ee0ae2c53bda89c4634cacfa8ca1.
Revert to for testing purpose.
Revert "OMAPDSS: DSS: Relax L3 bus bandwidth constraint"

This reverts commit 476ee2492812c7333df304aac9b8f045e0e49890.
For testing purpose