PAD_DAT_RD_RXDLY2
regval &= ~(PAD_DAT_RD_RXDLY | PAD_DAT_RD_RXDLY2);
regval |= FIELD_PREP(PAD_DAT_RD_RXDLY2, value);
regval |= FIELD_PREP(PAD_DAT_RD_RXDLY2, value - PAD_DELAY_HALF);