fpga: e31x/e320/n3xx/x400: Rework device tree file generation

... to support custom image core name, example:

    rfnoc_image_builder -y n310_rfnoc_image_core.yml -n my_custom_name

The device tree source files were renamed to match the target
name used in the Makefile.

    example:
        old: dts/usrp_n310_fpga_hg.dts
        new: dts/N310_HG.dts

The source file is used to compile the final .dts file in the BUILD_DIR.

    example: build-my_custom_name/N310_HG.dts

The final .dts file is copied to the BUILD_OUTPUT_DIR as part of the
post build steps and renamed to the custom image core name.

    example: build/my_custom_name.dts

This completes the change that was introduced with commit 2afc66f132.


Original-commit: d40db57f2e03c322ac6b0001e0a59d4a14a5a3b9

top/e320/Makefile

@@ -60,6 +60,8 @@ ifeq ($(TARGET),bin)
 		cp $(BUILD_DIR)/e320.bit $(BUILD_OUTPUT_DIR)/$(IMAGE_CORE_NAME).bit; \
 		echo "Exporting build report..."; \
 		cp $(BUILD_DIR)/build.rpt $(BUILD_OUTPUT_DIR)/$(IMAGE_CORE_NAME).rpt; \
+		echo "Exporting devicetree file..."; \
+		cp $(BUILD_DIR)/$(1).dts $(BUILD_OUTPUT_DIR)/$(IMAGE_CORE_NAME).dts; \
 		echo "Build DONE ... $(1)";
 else
 	post_build = @echo "Skipping bitfile export."
@@ -91,22 +93,21 @@ ifndef BUILD_DIR
 endif
 
 ##E320_1G:  1GigE on SFP+ Port.
-E320_1G: check-variables E320_IP $(BUILD_OUTPUT_DIR)/$(IMAGE_CORE_NAME).dts
+E320_1G: check-variables E320_IP $(BUILD_DIR)/E320_1G.dts
 	$(call vivado_build,E320,$(1G_DEFS) E320=1)
 	$(call post_build,E320_1G)
 
 ##E320_XG:  10GigE on SFP+ Port.
-E320_XG: check-variables E320_IP $(BUILD_OUTPUT_DIR)/$(IMAGE_CORE_NAME).dts
+E320_XG: check-variables E320_IP $(BUILD_DIR)/E320_XG.dts
 	$(call vivado_build,E320,$(XG_DEFS) E320=1)
 	$(call post_build,E320_XG)
 
 ##E320_AA:  Aurora on SFP+ Port.
-E320_AA: check-variables E320_IP $(BUILD_OUTPUT_DIR)/$(IMAGE_CORE_NAME).dts
+E320_AA: check-variables E320_IP $(BUILD_DIR)/E320_AA.dts
 	$(call vivado_build,E320,$(AA_DEFS) E320=1)
 	$(call post_build,E320_AA)
 
-$(BUILD_OUTPUT_DIR)/$(IMAGE_CORE_NAME).dts: dts/*.dts dts/*.dtsi
-	-mkdir -p $(BUILD_OUTPUT_DIR)
+$(BUILD_DIR)/%.dts: dts/%.dts dts/*.dtsi
 	${CC} -o $@ -E -I dts -nostdinc -undef -x assembler-with-cpp -D__DTS__ $<
 
 ##