[TASK] Add public include to Nios II stack libraries

Add public include path variable to Nios II stack libraries. This
enables the driver and demo application being independent of the used
stack library.

Change-Id: I790f779c83a79206bbd48799f10b3a5d1f00e041
[TASK] Revise CN Qsys sub system

- Move EPCS flash IP-Core to toplevel

Change-Id: I25470acf5f1f5e9cc23ac90bd115f54bec84bbf6
[TASK] Revise EPCS Flash programming

- Add program-epcs.sh script that can program an EPCS flash without
  connecting to Nios II instance (no need to erase flash before).
- Add EPCS support to driver application scripts.
- Add chain and converter setting files to TERASIC DE2-115 board.

Change-Id: Ia03a2dcd211c150cdb429b8e3dca42377cfdacec
[TASK] Revise Qsys subsystem of MN Altera drivers

Change-Id: If87a97422a8cad0af95f6c24a37949c4d271983f
[TEMP] Add skeleton liboplkmndrv-pcie

Change-Id: Ic9d52b832f9623226b30de3995407c8aab9f0132
[FEATURE] Add Quartus and Qsys project for Antares Interface

- Add MN pcp subsystem
- Add 256kx16 SRAM (tri-state-bridge)
- Add openMAC for single phy
- Add EPCS ipcore for M25P16 flash
- Add PCIe
- Add 125 MHz PLL output
- Add DPRAM for common memory
- Add pipeline bridge
- Connect PCIe with SRAM via pipeline bridge
- Separate reset interconnect for PCIe and Nios II / peripherals

Change-Id: I693fab99bd3628d3f1dfef111f40259f1e73b617