mediatek: bpi-r64: add eMMC bootloader artifacts

In order to allow easily updating the bootloader on eMMC also provide
artifacts for that. Support for updating bootloader via TFTP will be
added to the loader CLI menu in a follow-up commit.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

target/linux/mediatek/image/mt7622.mk

@@ -76,9 +76,11 @@ define Device/bananapi_bpi-r64
   DEVICE_DTS := mt7622-bananapi-bpi-r64
   DEVICE_DTS_OVERLAY := mt7622-bananapi-bpi-r64-pcie1 mt7622-bananapi-bpi-r64-sata
   DEVICE_PACKAGES := kmod-ata-ahci-mtk kmod-btmtkuart kmod-usb3 e2fsprogs mkf2fs f2fsck
-  ARTIFACTS := sdcard.img.gz snand-preloader.bin snand-bl31-uboot.fip
+  ARTIFACTS := emmc-preloader.bin emmc-bl31-uboot.fip sdcard.img.gz snand-preloader.bin snand-bl31-uboot.fip
   IMAGES := sysupgrade.itb
   KERNEL_INITRAMFS_SUFFIX := -recovery.itb
+  ARTIFACT/emmc-preloader.bin	:= bl2 emmc-2ddr
+  ARTIFACT/emmc-bl31-uboot.fip	:= bl31-uboot bananapi_bpi-r64-emmc
   ARTIFACT/snand-preloader.bin	:= bl2 snand-2ddr
   ARTIFACT/snand-bl31-uboot.fip	:= bl31-uboot bananapi_bpi-r64-snand
   ARTIFACT/sdcard.img.gz	:= mt7622-gpt sdmmc |\