IPoIB: Handle extended rates in debugfs

Use new function ib_rate_to_mbps() to handle printing rate in debugfs,
so that we handle extended rates.

Signed-off-by: Marcel Apfelbaum <marcela@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/ulp/ipoib/ipoib_fs.c

@@ -212,16 +212,15 @@ static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
 		   gid_buf, path.pathrec.dlid ? "yes" : "no");
 
 	if (path.pathrec.dlid) {
-		rate = ib_rate_to_mult(path.pathrec.rate) * 25;
+		rate = ib_rate_to_mbps(path.pathrec.rate);
 
 		seq_printf(file,
 			   "  DLID:     0x%04x\n"
 			   "  SL: %12d\n"
-			   "  rate: %*d%s Gb/sec\n",
+			   "  rate: %8d.%d Gb/sec\n",
 			   be16_to_cpu(path.pathrec.dlid),
 			   path.pathrec.sl,
-			   10 - ((rate % 10) ? 2 : 0),
-			   rate / 10, rate % 10 ? ".5" : "");
+			   rate / 1000, rate % 1000);
 	}
 
 	seq_putc(file, '\n');