53c9x changes of the night (August 11th, 2025)

1. Add the original AMD 53c974 (AMD bios only and revision 0x00 compared to the A revision which is 0x10 in the PCI regs) as well as correcting the SCSI bus reset when prompted (ESP CMD 0x03), the latter fixes DawiControl 53c974 drivers on win9x.
2. Check if DMA length is not 0 for DMA transfers.
3. More logs for possible problem diagnostics.

src/scsi/scsi.c

@@ -84,6 +84,7 @@ static SCSI_CARD scsi_cards[] = {
     { &buslogic_445c_device,     },
     /* PCI */
     { &am53c974_pci_device,      },
+    { &am53c974a_pci_device,     },
     { &buslogic_958d_pci_device, },
     { &ncr53c810_pci_device,     },
     { &ncr53c815_pci_device,     },