rockchip: move UBOOT_DEVICE_NAME to default

Simplify variable usage.

Signed-off-by: Tianling Shen <[email protected]>

target/linux/rockchip/image/Makefile

@@ -50,6 +50,7 @@ define Device/Default
   KERNEL = kernel-bin | lzma | fit lzma $$(DTS_DIR)/$$(DEVICE_DTS).dtb
   IMAGES := sysupgrade.img.gz
   DEVICE_DTS = rockchip/$$(SOC)-$(lastword $(subst _, ,$(1)))
+  UBOOT_DEVICE_NAME = $(lastword $(subst _, ,$(1)))-$$(SOC)
 endef
 
 include $(SUBTARGET).mk

target/linux/rockchip/image/armv8.mk

@@ -19,7 +19,6 @@ define Device/friendlyarm_nanopi-r2s
   DEVICE_VENDOR := FriendlyARM
   DEVICE_MODEL := NanoPi R2S
   SOC := rk3328
-  UBOOT_DEVICE_NAME := nanopi-r2s-rk3328
   IMAGE/sysupgrade.img.gz := boot-common | boot-script | pine64-img | gzip | append-metadata
   DEVICE_PACKAGES := kmod-usb-net-rtl8152
 endef
@@ -30,7 +29,6 @@ define Device/friendlyarm_nanopi-r4s
   DEVICE_MODEL := NanoPi R4S
   DEVICE_VARIANT := 4GB LPDDR4
   SOC := rk3399
-  UBOOT_DEVICE_NAME := nanopi-r4s-rk3399
   IMAGE/sysupgrade.img.gz := boot-common | boot-script | pine64-img | gzip | append-metadata
   DEVICE_PACKAGES := kmod-r8169
 endef
@@ -40,7 +38,6 @@ define Device/pine64_rockpro64
   DEVICE_VENDOR := Pine64
   DEVICE_MODEL := RockPro64
   SOC := rk3399
-  UBOOT_DEVICE_NAME := rockpro64-rk3399
   IMAGE/sysupgrade.img.gz := boot-common | boot-script | pine64-img | gzip | append-metadata
 endef
 TARGET_DEVICES += pine64_rockpro64