ARM: dts: imx6qdl-sr-som: Sync with kernel 5.8-rc1

Sync the device tree with 5.8-rc1.

It basically contains the following extra kernel commit:

commit 86b08bd5b99480b79a25343f24c1b8c4ddcb5c09
Author: Russell King <rmk+kernel@armlinux.org.uk>
Date:   Wed Apr 15 16:44:17 2020 +0100

    ARM: dts: imx6-sr-som: add ethernet PHY configuration

    Add ethernet PHY configuration ahead of removing the quirk that
    configures the clocking mode for the PHY.  The RGMII delay is
    already set correctly.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

, which passes the 'qca,clk-out-frequency' property and it is important
to specify the correct frequency generated by the AR8035.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Tom Rini <trini@konsulko.com>