Enables special frame re-alignment in the Line Driver. Only needed when
4 ethernet interfaces are configured on a single slot. Only needed if
experiencing transmit underflow errors (wfCSMACDUfloTx). When this
attribute is set to DISABLED, non-optimally aligned frames are transmitted
as is. When this attribute is set to ALL (1), all non-optimally aligned
frames are re-aligned before transmission. When this attribute is set to
ALIGN_OVER_128_BYTES (2), all non-optimally aligned frames over 128 bytes
in length are re-aligned before transmission and frames up to and including
128 bytes in length are transmitted as is.