Add SRAM macro PDN power connections for P&R#29
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The CF_SRAM_1024x32 macro has 6 power/ground pins (vpwrp, vpwra, vpwrm, vpb → VPWR; vgnd, vnb → VGND) that need explicit mapping to the top-level power grid. Without this, librelane exits with "6 critical disconnected pins found" after completing routing. Co-developed-by: Claude Code v2.1.44 (claude-opus-4-6)
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Summary
PDN_MACRO_CONNECTIONSconfig to map SRAM power pins to global VPWR/VGNDPin mapping
Context
Run 22385725048 failed after 83 minutes with:
[PDN-0231] soc.sram.mem.0.0 is not connected to any power/ground nets[PDN-0189] Supply pin soc.sram.mem.0.0/vnb is not connected to any net(and 5 similar)6 critical disconnected pins found→ exit code 2