fpga: x400: zbx: Add support for XO3 CPLD variant.

The main changes included are:
- Variant-dependent pin-out instantiation.
- Update clocking scheme in top level file
  to include XO3 PLL
- Add ability to shift outgoing data for
  the GPIO communication interface with
  the X410 FPGA.
- Include project files required to build
  the XO3 variant of the ZBX CPLD.
- Add build flow for Lattice Diamond designs.
- Add ability to build XO3 variant of ZBX CPLD.


Original-commit: 2c7813acb21383f302353a1b6cf57f0946fa0b6b

top/x400/dboards/zbx/cpld/Makefile.zbx_cpld.inc

@@ -20,6 +20,7 @@ PROJECT_DIR = $(abspath .)
 BASE_DIR = $(abspath ../../../../)
 IP_DIR = $(abspath ./ip)
 include $(BASE_DIR)/../tools/make/quartus_design_builder.mak
+include $(BASE_DIR)/../tools/make/diamond_design_builder.mak
 
 # Include IP directory
 include $(IP_DIR)/Makefile.inc
@@ -66,3 +67,7 @@ bin: .prereqs
 
 quar_ip: .prereqs ip
 	@echo "IP Build DONE ..."
+
+dmd_build : .diamond_prereqs
+	$(call BUILD_DIAMOND_DESIGN,$(TOP_MODULE),$(PART_ID),$(PROJECT_DIR),$(BUILD_DIR),$(IMPL))
+