arm64: dts: imx8mp-phycore-som: Remove eth phy interrupt

In some occasions the ethernet phy IRQ can not be detected correctly
by the SoC. This leads to a non detected link in Linux. The problem is
caused by the buffer that adjusts the voltage between ethernet phy
and SoC. To workaround this, remove the IRQ support for the ethernet
phy and use polling instead.
Signed-off-by: Christian Hemp <c.hemp@phytec.de>
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi

@@ -54,8 +54,6 @@ mdio {
 		ethphy1: ethernet-phy@0 {
 			compatible = "ethernet-phy-ieee802.3-c22";
 			reg = <0>;
-			interrupt-parent = <&gpio1>;
-			interrupts = <15 IRQ_TYPE_EDGE_FALLING>;
 			ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 			ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 			ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
@@ -222,7 +220,6 @@ MX8MP_IOMUXC_SAI1_TXD2__ENET1_RGMII_TD2		0x14
 			MX8MP_IOMUXC_SAI1_TXD3__ENET1_RGMII_TD3		0x14
 			MX8MP_IOMUXC_SAI1_TXD4__ENET1_RGMII_TX_CTL	0x14
 			MX8MP_IOMUXC_SAI1_TXD5__ENET1_RGMII_TXC		0x14
-			MX8MP_IOMUXC_GPIO1_IO15__GPIO1_IO15		0x11
 		>;
 	};