renesas-ra/Makefile: Remove id_code section from binary file generation.

The linker scripts for most of these microcontrollers contain a
non-contiguous flash section for the ID code that results in big binary
files, which exceed the flash size.  This commit removes the ID code
section from the main firmware binary, and outputs it to a separate binary,
which can be deployed manually if ID code is enabled.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Author: iabdalkader

ports/renesas-ra/Makefile

@@ -442,7 +442,8 @@ endef
 
 define GENERATE_BIN
 	$(ECHO) "GEN $(1)"
-	$(Q)$(OBJCOPY) -I ihex -O binary $(2) $(1)
+	$(Q)$(OBJCOPY) -O binary -j .id_code $(2) $(BUILD)/id_code.bin
+	$(Q)$(OBJCOPY) -O binary --remove-section=.id_code $(2) $(1)
 endef
 
 define GENERATE_HEX
@@ -452,7 +453,7 @@ endef
 
 .PHONY:
 
-$(BUILD)/firmware.bin: $(BUILD)/firmware.hex
+$(BUILD)/firmware.bin: $(BUILD)/firmware.elf
 	$(call GENERATE_BIN,$@,$^)
 
 $(BUILD)/firmware.hex: $(BUILD)/firmware.elf