layerscape: put u-boot and ucode images into image staging directory

Do not put the u-boot and ucode images into the kernel build directory as this
directory might get removed after kernel updates while the u-boot packages
InstallDev recipe is not getting re-executed because it is still considered
current, leading to image build failures later on due to missing images.

To ensure that built bootloader images persist over kernel version updates in
the buildroot, put them into the new STAGING_DIR_IMAGE directory.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

package/boot/uboot-layerscape-32b/Makefile

@@ -42,9 +42,10 @@ define Build/Compile
 endef
 
 define Build/InstallDev
-	$(CP) $(PKG_BUILD_DIR)/ls1043ardb-uboot.bin $(KERNEL_BUILD_DIR)/ls1043ardb-32b-uboot.bin
-	$(CP) $(PKG_BUILD_DIR)/ls1046ardb-uboot.bin $(KERNEL_BUILD_DIR)/ls1046ardb-32b-uboot.bin
-	$(CP) $(PKG_BUILD_DIR)/ls1012ardb-uboot.bin.swap $(KERNEL_BUILD_DIR)/ls1012ardb-32b-uboot.bin
+	$(INSTALL_DIR) $(STAGING_DIR_IMAGE)
+	$(CP) $(PKG_BUILD_DIR)/ls1043ardb-uboot.bin $(STAGING_DIR_IMAGE)/ls1043ardb-32b-uboot.bin
+	$(CP) $(PKG_BUILD_DIR)/ls1046ardb-uboot.bin $(STAGING_DIR_IMAGE)/ls1046ardb-32b-uboot.bin
+	$(CP) $(PKG_BUILD_DIR)/ls1012ardb-uboot.bin.swap $(STAGING_DIR_IMAGE)/ls1012ardb-32b-uboot.bin
 endef
 
 $(eval $(call BuildPackage,uboot-layerscape-32b))

package/boot/uboot-layerscape/Makefile

@@ -49,7 +49,8 @@ UBOOT_TARGETS := \
 	ls1012ardb
 
 define Build/InstallDev
-	$(INSTALL_DATA) $(PKG_BUILD_DIR)/$(UBOOT_IMAGE) $(KERNEL_BUILD_DIR)/$(BUILD_VARIANT)-64b-uboot.bin
+	$(INSTALL_DIR) $(STAGING_DIR_IMAGE)
+	$(INSTALL_DATA) $(PKG_BUILD_DIR)/$(UBOOT_IMAGE) $(STAGING_DIR_IMAGE)/$(BUILD_VARIANT)-64b-uboot.bin
 endef
 
 define Package/u-boot/install/default

package/firmware/fman-ucode/Makefile

@@ -72,7 +72,8 @@ define Build/Compile
 endef
 
 define Package/fman/install/default
-	$(CP) $(PKG_BUILD_DIR)/$(FMAN_CONFIG) $(KDIR)/$(1)-fman.bin
+	$(INSTALL_DIR) $(STAGING_DIR_IMAGE)
+	$(CP) $(PKG_BUILD_DIR)/$(FMAN_CONFIG) $(STAGING_DIR_IMAGE)/$(1)-fman.bin
 endef
 
 define Package/fman/install/template

package/firmware/rcw/Makefile

@@ -81,7 +81,8 @@ define Build/Compile
 endef
 
 define Package/rcw/install/default
-	$(CP) $(PKG_BUILD_DIR)/$(RCW_CONFIG) $(KDIR)/$(1)-rcw.bin
+	$(INSTALL_DIR) $(STAGING_DIR_IMAGE)
+	$(CP) $(PKG_BUILD_DIR)/$(RCW_CONFIG) $(STAGING_DIR_IMAGE)/$(1)-rcw.bin
 endef
 
 define Package/rcw/install/template

target/linux/layerscape/image/Makefile

@@ -9,15 +9,15 @@ include $(INCLUDE_DIR)/image.mk
 
 define Build/append-ls-rcw
 	rm -f $@
-	dd if=$(KDIR)/$(1)-rcw.bin >> $@
+	dd if=$(STAGING_DIR_IMAGE)/$(1)-rcw.bin >> $@
 endef
 
 define Build/append-ls-uboot
-	dd if=$(KDIR)/$(1)-$(SUBTARGET)-uboot.bin >> $@
+	dd if=$(STAGING_DIR_IMAGE)/$(1)-$(SUBTARGET)-uboot.bin >> $@
 endef
 
 define Build/append-ls-fman
-	dd if=$(KDIR)/$(1)-fman.bin >> $@
+	dd if=$(STAGING_DIR_IMAGE)/$(1)-fman.bin >> $@
 endef
 
 define Build/append-ls-dtb