fix(atapi): fix size in send_packet

k/atapi.c

@@ -132,7 +132,7 @@ void *read_block(size_t lba)
     pkt.lba_hi   = (lba >> 0x18) & 0xff;
     pkt.transfer_length_lo = 1;
 
-    send_packet(&pkt, a_drive.reg, PACKET_SZ);
+    send_packet(&pkt, a_drive.reg, CD_BLOCK_SZ);
 
     // we can now read
     uint16_t *buf = (uint16_t *)block;