Fix a few bits of confusion, as with previous gen's constlen is aligned
to 4, and value in bitfield is left-shifted by 2 (ie. divided by 4).
But this is done by the CONSTLEN() accessor/builder fxn, so don't do it
twice.  Also HLSQ_FS_CNTL.CONSTLEN is not special.

Signed-off-by: Rob Clark <robdclark@gmail.com>