Sort constants in csr generation.

Previously the order of constant output depended on Python's hashing order
which changes every run. This caused the file to change every run.

With this change the csr.h file will always be the same. This can be verified
this with the following;
```bash
 CSR=software/include/generated/csr.h
 for i in 1 2 3 4 5 6; do
   rm -f $CSR; python make.py build-headers
   cp $CSR $CSR.$i
 done
 md5sum $CSR.*
```

diff --git a/make.py b/make.py
index b0d3967d7d4babcbf887a8bfc80b5e42dc1e57fe..fc2eb0d89764f82ccf71296a8766b3b709f6bccc 100755 (executable)
--- a/make.py
+++ b/make.py
@@ -167,7 +167,7 @@ CPU type:  {}
                     write_to_file(os.path.join(genhdir, "sdram_phy.h"), boilerplate + sdram_phy_header)
         mem_header = cpuif.get_mem_header(memory_regions, getattr(soc, "flash_boot_address", None))
         write_to_file(os.path.join(genhdir, "mem.h"), boilerplate + mem_header)
-        csr_header = cpuif.get_csr_header(csr_regions, soc.get_constants())
+        csr_header = cpuif.get_csr_header(csr_regions, sorted(soc.get_constants()))
         write_to_file(os.path.join(genhdir, "csr.h"), boilerplate + csr_header)
 
     if actions["build-csr-csv"]: