r8152: fix the poor throughput for 2.5G devices

r8152: fix the poor throughput for 2.5G devices

[ Upstream commit 61b0ad6f58e2066e054c6d4839d67974d2861a7d ]

Fix the poor throughput for 2.5G devices, when changing the speed from
auto mode to force mode. This patch is used to notify the MAC when the
mode is changed.

Fixes: 195aae321c82 ("r8152: support new chips")
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>