ice40: Fix RAM pin metadata for rr_nodes.
ice40: Fix RAM pin metadata for rr_nodes.

rr_node pins actually have the xhigh/xlow of the tile the pin is located
on. This means we shouldn't also have an offset on the metadata.

Signed-off-by: Tim 'mithro' Ansell <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@mith.ro>
Signed-off-by: Jeffrey Elms <23ce84ca7a7de9dc17ad8e8b0bbd717d4f9f9884@freshred.net>

SymbiFlow/symbiflow-arch-defs,SymbiFlow/symbiflow-arch-defs