net: ll_temac: Replace bad usage of msleep() with usleep_range()

Use usleep_range() to avoid problems with msleep() actually sleeping
much longer than expected.
Signed-off-by: Esben Haabendal <esben@geanix.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/xilinx/ll_temac_main.c

@@ -92,7 +92,7 @@ int temac_indirect_busywait(struct temac_local *lp)
 			WARN_ON(1);
 			return -ETIMEDOUT;
 		}
-		msleep(1);
+		usleep_range(500, 1000);
 	}
 	return 0;
 }