intel: Use devinfo->urb.min_entries[GS and TCS] for setting URB configs

We were not using the minimum values from devinfo for anything.  For
tessellation control, the minimum value is 0, so we continue taking
MAX2 of that with 1 when tessellation is enabled so we have at least
something guaranteed to be present.  For geometry, the minimum value
is already non-zero (and updated by the previous patch).

This will have the side-effect of raising the minimum number of URB
entries for geometry stages.  This is currently not known to fix
anything, but should be more closely following the documentation.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <mesa/mesa!33764>