ARM: dts: add EMAC AXI settings for Cyclone5

Add the dts entries needed to support the EMAC AXI bus settings on the
Cyclone5.

Signed-off-by: Dinh Nguyen <[e-mail]>

arch/arm/boot/dts/socfpga.dtsi

···
 			interrupts = <0 175 4>;
 		};
 
+		socfpga_axi_setup: stmmac-axi-config {
+			snps,wr_osr_lmt = <0xf>;
+			snps,rd_osr_lmt = <0xf>;
+			snps,blen = <0 0 0 0 16 0 0>;
+		};
+
 		gmac0: ethernet@ff700000 {
 			compatible = "altr,socfpga-stmmac", "snps,dwmac-3.70a", "snps,dwmac";
 			altr,sysmgr-syscon = <&sysmgr 0x60 0>;
···
 			snps,perfect-filter-entries = <128>;
 			tx-fifo-depth = <4096>;
 			rx-fifo-depth = <4096>;
+			snps,axi-config = <&socfpga_axi_setup>;
 			status = "disabled";
 		};
 
···
 			snps,perfect-filter-entries = <128>;
 			tx-fifo-depth = <4096>;
 			rx-fifo-depth = <4096>;
+			snps,axi-config = <&socfpga_axi_setup>;
 			status = "disabled";
 		};