Add PCIe Root Port support for Stratix 10 device.
Main differences compared to the PCIe Root Port IP on Cyclone V
and Arria 10 devices:
- HIP interface to access Root Port configuration register
- TLP programming flow:
- One REG0 register
- Don't need to check alignment
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>