iopsys-econet: Add env vars required for uboot build

Econet Uboot build require env variabels stored in mi.conf file.

Signed-off-by: Bartlomiej Grzeskowiak <bartlomiej.grzeskowiak@iopsys.eu>

iopsys-econet/en7562/mi.conf

+bootcmd=flash imgread 2048\;bootm
+bootdelay=3
+baudrate=115200
+ethaddr=00:AA:BB:01:23:40
+ipaddr=192.168.1.1
+serverip=192.168.1.100
+bootfile=tclinux.bin
+loadaddr=0x81800000
+arch=arm
+cpu=armv7
+board=en7523_evb
+board_name=en7523_evb
+vendor=ecnt
+soc=en7523
+root=/dev/mtdblock3 ro
+console=ttyS0,115200n8 earlycon
+;
+; SDRAM parameter
+;
+sdram_conf=0x00108893
+;
+; Vendor name
+;
+vendor_name=ECONET Technologies Corp.
+;
+; Product name
+;
+product_name=xPON ONU
+;
+; SNMP system object id
+;
+snmp_sysobjid=1.2.3.4.5
+;
+; Country code
+;
+country_code=ff
+;
+; Ethernet GPIO
+;
+ether_gpio=0c
+;Power LED GPIO
+;
+power_gpio=1515
+;
+; UserName
+;
+username=admin
+;
+; Password
+;
+password=1234
+;
+; ADSL GPIO
+;
+dsl_gpio=0b
+;
+; Internet GPIO
+;
+;00 means auto detection
+internet_gpio=02
+;
+; Multi upgrade GPIO, the max num is 16 bytes
+;
+multi_upgrade_gpio=0b020400000000000000000000000000
+;
+; xPON ONU Type, 0--unknown, 1--SFU, 2--HGU, [7:4], 0x0--Auto, 0x1:GPON, 0x2:EPON, 0x3:XEPON_10G_1G,
+; 0x4:XEPON_10G_10G, 0x5:XEPON_1G_1G, 0x6:XGPON, 0x7:XGSPON...
+onu_type=2
+;
+; EN7580 QDMA init setting
+; [1:0], 0x0--qdma_lan payload size 2k, 0x1--qdma_lan 1k, 0x2--qdma_lan 512, 0x3--qdma_lan 256
+; [2], reserve
+; [3], 0x0--qdma_lan dscp in DRAM, 0x1--qdma_lan dscp in SRAM
+; [5:4], 0x0--qdma_wan payload size 2k, 0x1--qdma_wan 1k, 0x2--qdma_wan 512, 0x3--qdma_wan 256
+; [6], reserve
+; [7], 0x0--qdma_wan dscp in DRAM, 0x1--qdma_wan dscp in SRAM
+; default set: qdma_lan in SRAM, 256Byte payload; qdma_wan in DRAM, 256Byte payload
+qdma_init=33
+; Serdes selection setting, serdes_sel is hex value
+; bit0: pon port,	0: select to pon,	1: select to HSGMII
+; bit1: usb3 port,	0: select to usb3,	1: select to HSGMII
+; bit2: pcie0 port,	0: select to pcie0,	1: select to HSGMII
+; bit3: pcie1 port,	0: select to pcie1,	1: select to HSGMII
+serdes_sel=0
+;EN7523 related
+kernel_filename=tclinux.bin
+uboot_filename=tcboot.bin
+fdt_high=0xac000000
+invaild_env=no
+stdin=serial
+stdout=serial
+stderr=serial
+;
+; SPI NAND flash page size magic, 'P' 'A' 'G' 'E' = 0x50414745
+; store to constant data area(0xFFB0 ~ 0xFFFF) on 256KB tcboot.bin.
+;
+;cd_flash_page_size_magic=0x50414745
+;
+; Temporarilly usage,for 75xx serious identification on FPGA.It should be removed as merging back to Main Trunk
+;