v2.1.0: Bender and Ibex support

Added

• Added Bender.yml file for bender compatibility
• Added obi_pulp_adapter

Changed

• updated ibex
• change from deprecated generic_memory to tc_sram tech cell, bump tech_cells_generic accordingly
• Expose L2 Bank sizes to improve consistency
• updated apb_fll_if, removed local interface definition to use the one defined externally
• updated hwpe-mac-engine