uboot-envtools: add environment config for MeiG SLT866

Add configuration to access U-Boot environment on MeiG SLT866.

Signed-off-by: Daniel Golle <[email protected]>

package/boot/uboot-envtools/files/ramips

@@ -20,6 +20,7 @@ alfa-network,tube-e4g|\
 engenius,epg600|\
 engenius,esr600h|\
 linksys,re7000|\
+meig,slt866|\
 sitecom,wlr-4100-v1-002|\
 zyxel,keenetic-lite-iii-a)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x1000" "0x1000"