Add pipeline on SpiMaster.sv MISO
Add a single clock pipeline register on the MISO pin of the SpiMaster.sv to improve timing.
Also fix a small bug in the VoltageMonitoring.sv address selection.
Add a single clock pipeline register on the MISO pin of the SpiMaster.sv to improve timing.
Also fix a small bug in the VoltageMonitoring.sv address selection.