add btb optimized for FPGA targets (!1016) · Merge requests · OpenHW Group / backup-20241120 / cva6

Created by: sjthales

Hello @JeanRochCoulon @zarubaf

BTB module adapted for FPGA targets, predictable adresses are stored in BRAM for FPGA and in D flip-flops for ASIC Targets.
Flushing is not supported for FPGA.

I re-submit a PR to resolve conflicts due to latest modifications these last days.

Can this PR be merged quickly to avoid possible conflicts?

add btb optimized for FPGA targets