arm64: dts: meson: add ethernet fifo sizes

If unspecified in DT, the fifo sizes are not automatically detected by
the dwmac1000 dma driver and the reported fifo sizes default to 0.
Because of this, flow control will be turned off on the device.

Add the fifo sizes provided by the datasheets in the SoC in DT so
flow control may be enabled if necessary.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-axg.dtsi

@@ -182,6 +182,8 @@ ethmac: ethernet@ff3f0000 {
 				 <&clkc CLKID_FCLK_DIV2>,
 				 <&clkc CLKID_MPLL2>;
 			clock-names = "stmmaceth", "clkin0", "clkin1";
+			rx-fifo-depth = <4096>;
+			tx-fifo-depth = <2048>;
 			status = "disabled";
 		};
 

arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi

@@ -106,6 +106,8 @@ ethmac: ethernet@ff3f0000 {
 				 <&clkc CLKID_FCLK_DIV2>,
 				 <&clkc CLKID_MPLL2>;
 			clock-names = "stmmaceth", "clkin0", "clkin1";
+			rx-fifo-depth = <4096>;
+			tx-fifo-depth = <2048>;
 			status = "disabled";
 
 			mdio0: mdio {

arch/arm64/boot/dts/amlogic/meson-gx.dtsi

@@ -493,6 +493,8 @@ ethmac: ethernet@c9410000 {
 			       0x0 0xc8834540 0x0 0x4>;
 			interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "macirq";
+			rx-fifo-depth = <4096>;
+			tx-fifo-depth = <2048>;
 			status = "disabled";
 		};