mediatek: stage mt7622/mt7629 rfb u-boot images to bin folder

These u-boot images are no longer automatically copied to the
bindir since commit:
ed5000431940 ("uboot-mediatek: add support for Linksys E8450")

Signed-off-by: Shiji Yang <[email protected]>

target/linux/mediatek/image/mt7622.mk

@@ -260,6 +260,9 @@ define Device/mediatek_mt7622-rfb1
   DEVICE_MODEL := MTK7622 rfb1 AP
   DEVICE_DTS := mt7622-rfb1
   DEVICE_PACKAGES := kmod-ata-ahci-mtk kmod-btmtkuart kmod-usb3
+  UBOOT_PATH := $(STAGING_DIR_IMAGE)/mt7622_rfb1-u-boot-mtk.bin
+  ARTIFACTS := u-boot.bin
+  ARTIFACT/u-boot.bin := append-uboot
 endef
 TARGET_DEVICES += mediatek_mt7622-rfb1
 
@@ -279,6 +282,9 @@ define Device/mediatek_mt7622-rfb1-ubi
   IMAGE/factory.bin := append-kernel | pad-to $$(KERNEL_SIZE) | append-ubi | \
                 check-size $$$$(IMAGE_SIZE)
   IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+  UBOOT_PATH := $(STAGING_DIR_IMAGE)/mt7622_rfb1-u-boot-mtk.bin
+  ARTIFACTS := u-boot.bin
+  ARTIFACT/u-boot.bin := append-uboot
 endef
 TARGET_DEVICES += mediatek_mt7622-rfb1-ubi
 

target/linux/mediatek/image/mt7629.mk

@@ -7,6 +7,9 @@ define Device/mediatek_mt7629-rfb
   DEVICE_MODEL := MT7629 rfb AP
   DEVICE_DTS := mt7629-rfb
   DEVICE_PACKAGES := swconfig
+  UBOOT_PATH := $(STAGING_DIR_IMAGE)/mt7629_rfb-u-boot-mtk.bin
+  ARTIFACTS := u-boot.bin
+  ARTIFACT/u-boot.bin := append-uboot
 endef
 TARGET_DEVICES += mediatek_mt7629-rfb