Update vivado version to 2020.2:
- update default vivado version from 2020.1 to 2020.2
- add conditions to apply specific contraints only in Out Of Context mode.
- update DDR controler parameters for vcu118 and kcu105 dev boards
Set the properties to mirror the hardware configuration so
the Vivado tools can provide warnings if there are any conflicts
between configuration pin settings, such as an IOSTANDARD
on a multi-function configuration pin that conflicts with the
configuration voltage.
see:
https://www.xilinx.com/support/documentation/user_guides/ug570-ultrascale-configuration.pdf
The following base constraints were updated:
- kcu105
- kc705
- vc707
- ac701