Add Block Storage Service prototype for N1SDP
This change integrates the prototype Block Storage Service from Trusted Services on the N1SDP platform:
- Modifies Trusted Services recipes to fetch source from
block_storage
topic branch for N1SDP - Create a new Trusted Service recipe to build the Block Storage SP
- Define a new machine feature (ts-block-storage) for the N1SDP (disabled by default)
- Fix an issue in meta-arm which causes libts build to fail (this can be dropped when this patch is up-streamed to meta-arm)
The Block Storage Service is limited to the N1SDP platform for now as support for Corstone-1000 has not yet been agreed with Trusted Services.