ARM: dts: imx6dl-riotboard: configure PHY clock and set proper EEE value

stable inclusion
from stable-5.10.53
commit 6f5891a560dff4b3695a8533c02eeedd39b3ccb9
bugzilla: 175574 https://gitee.com/openeuler/kernel/issues/I4DTUX

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6f5891a560dff4b3695a8533c02eeedd39b3ccb9



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[ Upstream commit 723de6a4 ]

Without SoC specific PHY fixups the network interface on this board will
fail to work. Provide missing DT properties to make it work again.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>