Technically you can enable it independently on CORE and GLOBAL
output, but this is not exposed in the classic primitive, so
we do the same as icecube2 and enable/disable it for both output
path depending on the argument
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
The icebox DB is a bit inconsistent in how global network connections
are represented. Here we make it appear consistent by creating ports
on the cells that can drive it.
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>