Update PPSi

- Include missing in wr-constants.h
- Get Hw specification from halshmem instead of define
- Some modifications to access to FPGA

ppsi @ 552c0bc3

-Subproject commit 420da467c4edbc76e830aca7a8b4b43be8e6ffdd
+Subproject commit 552c0bc3cd1e672f7d6daa1c23a61454bc43b2c1