tms380tr: Use mdelay() in tms380tr_wait().

This driver tries to do up to half-second udelay()
calls, which overflows on x86-64.

Reported-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tokenring/tms380tr.c b/drivers/net/tokenring/tms380tr.c
index 663b886..7930203 100644
--- a/drivers/net/tokenring/tms380tr.c
+++ b/drivers/net/tokenring/tms380tr.c
@@ -1220,7 +1220,7 @@
 		tmp = schedule_timeout_interruptible(tmp);
 	} while(time_after(tmp, jiffies));
 #else
-	udelay(time);
+	mdelay(time / 1000);
 #endif
 }