ST_COEFFWREN
if (val & ST_COEFFWREN)
MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));
MCBSP_ST_WRITE(mcbsp, SSELCR, val | ST_COEFFWREN);
MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));