MMP3 QSEVEN: add DDR_CONSTRAINT_LVL2 support Ported Q7 BetaRC 6004-MMP3 QSEVEN: add DDR_CONSTRAINT_LVL2 support Signed-off-by: Danfeng Hong <hongd@marvell.com> Signed-off-by: Frank Fang <frankf@marvell.com> (cherry picked from commit c190b51b2dc97eb406a4815c4b6e609a9c2670d7) Signed-off-by: Wen-chien Jesse Sung <jesse.sung@canonical.com>