scsi: add AMD PCscsi driver

This is a driver for an AMD PCscsi (am53c974) SCSI card.  It can be
used together with DOS or old operating systems such as Windows NT 3.1,
Windows 3.1 or Windows 98.

Cc: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/src/esp-scsi.h b/src/esp-scsi.h
new file mode 100644
index 0000000..dc555f3
--- /dev/null
+++ b/src/esp-scsi.h
@@ -0,0 +1,8 @@
+#ifndef __ESP_SCSI_H
+#define __ESP_SCSI_H
+
+struct disk_op_s;
+int esp_scsi_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize);
+void esp_scsi_setup(void);
+
+#endif /* __ESP_SCSI_H */