ath79: nand: add SUPPORTED_DEVICES for Meraki MR18

This adds the board name from ar71xx to support upgrade without
-F for the Meraki MR18.

Signed-off-by: Samuele Longhi <[email protected]>

target/linux/ath79/image/nand.mk

@@ -312,6 +312,7 @@ define Device/meraki_mr18
 # KERNEL_INITRAMFS := $$(KERNEL)
   KERNEL_INITRAMFS :=
   IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+  SUPPORTED_DEVICES += mr18
 endef
 TARGET_DEVICES += meraki_mr18