The DMA reset timeout, used in read_poll_timeout, is
ten times shorter than the sleep time.
This patch fixes these values interchanging them, as it was
before the read_poll_timeout introduction.

Fixes: 8a70aeca ("net: stmmac: Use readl_poll_timeout")
Signed-off-by: NEmiliano Ingrassia <ingrassia@epigenesys.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>