This patch enables support to use the first segment
headroom to build the HW required Scatter Gather
Table. (if space is available).
This will avoid 1 less buffer for SG buffer creation.
Signed-off-by: Sachin Saxena <sachin.saxena@oss.nxp.com>
Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>