V1.1, cleanup full integration vexriscv and vexriscv_smp

cleanup full integration vexriscv and vexriscv_smp

V1.0, pre-built bitstreams.

This is the initial release, featuring Orangecart bitstreams for

• VexRiscV-SMP single core, FPU
• VexRiscV-SMP dual core
  including device tree files for Linux.