- Added dummy data setup API to allow users to configure
  the dummy data to be transferred.
- Added new APIs for half-duplex transfer function. Users
  can send and receive data by one API in the polling/interrupt/EDMA way,
  and they can choose either to transmit first or to receive first.
  Additionally, the PCS pin can be configured as assert status in
  transmission (between transmit and receive) by setting the
  isPcsAssertInTransfer to true.
- Fix for MISRA issues

Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>