ramips: unifiy sysupgrade file extensions

Use .bin as file extension where possible. The user doesn't need to that
sysupgrade images for NAND boards are tarballs.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/ramips/image/mt7621.mk

@@ -219,10 +219,10 @@ define Device/mir3g
   KERNEL_SIZE := 4096k
   IMAGE_SIZE := 32768k
   UBINIZE_OPTS := -E 5
-  IMAGES := sysupgrade.tar kernel1.bin rootfs0.bin
+  IMAGES += kernel1.bin rootfs0.bin
   IMAGE/kernel1.bin := append-kernel
   IMAGE/rootfs0.bin := append-ubi | check-size $$$$(IMAGE_SIZE)
-  IMAGE/sysupgrade.tar := sysupgrade-tar | append-metadata
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
   DEVICE_TITLE := Xiaomi Mi Router 3G
   SUPPORTED_DEVICES += R3G
   DEVICE_PACKAGES := \
@@ -274,8 +274,8 @@ define Device/r6220
   KERNEL_SIZE := 4096k
   IMAGE_SIZE := 28672k
   UBINIZE_OPTS := -E 5
-  IMAGES := sysupgrade.tar kernel.bin rootfs.bin
-  IMAGE/sysupgrade.tar := sysupgrade-tar | append-metadata
+  IMAGES += kernel.bin rootfs.bin
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
   IMAGE/kernel.bin := append-kernel
   IMAGE/rootfs.bin := append-ubi | check-size $$$$(IMAGE_SIZE)
   DEVICE_TITLE := Netgear R6220
@@ -327,7 +327,7 @@ define Device/re350-v1
   TPLINK_HEADER_VERSION := 1
   IMAGE_SIZE := 6016k
   KERNEL := $(KERNEL_DTB) | tplink-v1-header -e -O
-  IMAGES := sysupgrade.bin factory.bin
+  IMAGES += factory.bin
   IMAGE/sysupgrade.bin := append-rootfs | tplink-safeloader sysupgrade | append-metadata | check-size $$$$(IMAGE_SIZE)
   IMAGE/factory.bin := append-rootfs | tplink-safeloader factory
 endef
@@ -368,9 +368,8 @@ define Device/ubnt-erx
   DTS := UBNT-ERX
   FILESYSTEMS := squashfs
   KERNEL_SIZE := 3145728
-  IMAGES := sysupgrade.tar
   KERNEL_INITRAMFS := $$(KERNEL) | ubnt-erx-factory-image $(KDIR)/tmp/$$(KERNEL_INITRAMFS_PREFIX)-factory.tar
-  IMAGE/sysupgrade.tar := sysupgrade-tar | append-metadata
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
   DEVICE_TITLE := Ubiquiti EdgeRouter X
 endef
 TARGET_DEVICES += ubnt-erx

target/linux/ramips/image/mt76x8.mk

@@ -399,7 +399,7 @@ define Device/zyxel_keenetic-extra-ii
   DEVICE_TITLE := ZyXEL Keenetic Extra II
   DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci kmod-usb-ledtrig-usbport
   IMAGES += factory.bin
-  IMAGE/factory.bin := $$(IMAGE/sysupgrade.bin) | pad-to $$$$(BLOCKSIZE) | \
+  IMAGE/factory.bin := $$(sysupgrade_bin) | pad-to $$$$(BLOCKSIZE) | \
 	check-size $$$$(IMAGE_SIZE) | zyimage -d 6162 -v "ZyXEL Keenetic Extra II"
 endef
 TARGET_DEVICES += zyxel_keenetic-extra-ii