uboot-envtools: mt7622: use 4k sectors for UniFi 6 LR (ubootmod)

Use 4k sectors when accessing the U-Boot environment on the 64MiB
SPI-NOR flash chip found in the UniFi 6 LR. The speeds up environment
write access as only 4kB instead of 64kB have to be written.

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

package/boot/uboot-envtools/files/mediatek_mt7622

@@ -39,7 +39,7 @@ ruijie,rg-ew3200gx-pro)
 	ubootenv_add_uci_config "/dev/mtd3" "0x0" "0x20000" "0x20000"
 	;;
 ubnt,unifi-6-lr-ubootmod)
-	ubootenv_add_uci_config "/dev/mtd2" "0x0" "0x4000" "0x10000"
+	ubootenv_add_uci_config "/dev/mtd2" "0x0" "0x4000" "0x1000"
 	;;
 xiaomi,redmi-router-ax6s)
 	ubootenv_add_uci_config "/dev/mtd3" "0x0" "0x10000" "0x40000"