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dxl
a286002d27
Replace the hard-coded AT91 PDC register access in SniffIso14443a() with
cross-platform helpers for the RX double-buffer status/refresh, so the
sniffer no longer depends on AT91-specific registers.
- Add FPGA_SSC_DMA_RX_{Primary,Secondary}_Done and
FPGA_SSC_DMA_RX_Refresh_{Both,Secondary} to fpga_apis.h.
- AT91: primary maps to PDC RPR/RCR, secondary ("next") to RNPR/RNCR.
- AT32: no double buffer, so the primary path is a no-op and all re-arming
is done through the secondary (single-shot DMA re-arm).