hikey960/hikey: Transition to using to vendor-package

Moves the bootloader objects, and mali libraries to the vendor
package and adds the support files, tweaking the flash-all.sh
script

Will use the vendor-package located here:
  https://releases.linaro.org/android/aosp-linaro-vendor-package/extract-linaro_devices-20220210.tgz

Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I5e22c28c6f2c9ce3a7ec42e72411192dfbb6b312
diff --git a/build/tasks/dtimage.mk b/build/tasks/dtimage.mk
index 4d6a74d..e125d17 100644
--- a/build/tasks/dtimage.mk
+++ b/build/tasks/dtimage.mk
@@ -1,7 +1,7 @@
 ifneq ($(filter hikey%, $(TARGET_DEVICE)),)
 ifneq ($(TARGET_NO_DTIMAGE), true)
 
-MKDTIMG := device/linaro/hikey/installer/hikey960/mkdtimg
+MKDTIMG := $(LINARO_VENDOR_PATH)/hikey960/$(EXPECTED_LINARO_VENDOR_VERSION)/bootloader/mkdtimg
 DTB := $(PRODUCT_OUT)/hi3660-hikey960.dtb
 
 $(PRODUCT_OUT)/dt.img: $(DTB)