feat(build-lib): Update iob_cache_setup.py; Remove makefile swreg.

[arturum1]

• Revert some changes from commit d8b13ab.
• Generate headers directly in build dir.
• Swreg is now handled by setup.py. There is no longer a need for it in hw_setup.mk and sw_setup.mk
• Add macros
• Change regs from string values to int
• Manually add "clk_i" and "rst_i" signals, as included file contains "arst_i" that is not used by this component.