Revert mdc's warnings purge on natsemi.c, to allow for a clean rebase.

src/drivers/net/natsemi.c

         rxd[i].bufptr = virt_to_bus(&rxb[i*RX_BUF_SIZE]);
         if (natsemi_debug > 1)
             printf("natsemi_init_rxd: rxd[%d]=%p link=%X cmdsts=%X bufptr=%4.4x\n", 
-                   i, &rxd[i], (unsigned int) rxd[i].link, (unsigned int) rxd[i].cmdsts, 
-		   (unsigned int) rxd[i].bufptr);
+                   i, &rxd[i], rxd[i].link, rxd[i].cmdsts, rxd[i].bufptr);
     }
 
     /* load Receive Descriptor Register */
         /* wait */ ;
 
     if (currticks() >= to) {
-        printf("natsemi_transmit: TX Timeout! Tx status %X.\n", (unsigned int) tx_status);
+        printf("natsemi_transmit: TX Timeout! Tx status %X.\n", tx_status);
     }
 
     if (!(tx_status & 0x08000000)) {
-	printf("natsemi_transmit: Transmit error, Tx status %X.\n", (unsigned int) tx_status);
+	printf("natsemi_transmit: Transmit error, Tx status %X.\n", tx_status);
     }
 }
 
     int retstat = 0;
 
     if (natsemi_debug > 2)
-        printf("natsemi_poll: cur_rx:%d, status:%X\n", cur_rx, (unsigned int) rx_status);
+        printf("natsemi_poll: cur_rx:%d, status:%X\n", cur_rx, rx_status);
 
     if (!(rx_status & OWN))
         return retstat;
 
     if (natsemi_debug > 1)
         printf("natsemi_poll: got a packet: cur_rx:%d, status:%X\n",
-               cur_rx, (unsigned int) rx_status);
+               cur_rx, rx_status);
 
     nic->packetlen = (rx_status & DSIZE) - CRC_SIZE;
 
     if ((rx_status & (DescMore|DescPktOK|RxTooLong)) != DescPktOK) {
         /* corrupted packet received */
         printf("natsemi_poll: Corrupted packet received, buffer status = %X\n",
-               (unsigned int) rx_status);
+               rx_status);
         retstat = 0;
     } else {
         /* give packet to higher level routine */