ipq806x: fix ethernet DMA parameters with linux 4.9

Signed-off-by: Felix Fietkau <nbd@nbd.name>

target/linux/ipq806x/files-4.9/arch/arm/boot/dts/qcom-ipq8064.dtsi

@@ -941,6 +941,12 @@
 			reg = <0x1bb00000 0x000001FF>;
 		};
 
+		stmmac_axi_setup: stmmac-axi-config {
+			snps,wr_osr_lmt = <7>;
+			snps,rd_osr_lmt = <7>;
+			snps,blen = <16 0 0 0 0 0 0>;
+		};
+
 		gmac0: ethernet@37000000 {
 			device_type = "network";
 			compatible = "qcom,ipq806x-gmac";
@@ -948,6 +954,10 @@
 			interrupts = <GIC_SPI 220 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "macirq";
 
+			snps,axi-config = <&stmmac_axi_setup>;
+			snps,pbl = <32>;
+			snps,aal = <1>;
+
 			qcom,nss-common = <&nss_common>;
 			qcom,qsgmii-csr = <&qsgmii_csr>;
 
@@ -967,6 +977,10 @@
 			interrupts = <GIC_SPI 223 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "macirq";
 
+			snps,axi-config = <&stmmac_axi_setup>;
+			snps,pbl = <32>;
+			snps,aal = <1>;
+
 			qcom,nss-common = <&nss_common>;
 			qcom,qsgmii-csr = <&qsgmii_csr>;
 
@@ -986,6 +1000,10 @@
 			interrupts = <GIC_SPI 226 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "macirq";
 
+			snps,axi-config = <&stmmac_axi_setup>;
+			snps,pbl = <32>;
+			snps,aal = <1>;
+
 			qcom,nss-common = <&nss_common>;
 			qcom,qsgmii-csr = <&qsgmii_csr>;
 
@@ -1005,6 +1023,10 @@
 			interrupts = <GIC_SPI 229 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "macirq";
 
+			snps,axi-config = <&stmmac_axi_setup>;
+			snps,pbl = <32>;
+			snps,aal = <1>;
+
 			qcom,nss-common = <&nss_common>;
 			qcom,qsgmii-csr = <&qsgmii_csr>;