Revert "gen_app_partitions.py: make generated/app_smem_*.ld files deterministic"

This reverts commit 725abdf which did get rid of randomness in the
order of the partition _names_ as claimed but regressed commit
212ec9a / feature #14121 and broke the previous size order which I
missed. Huge thanks to Sigvart Hovland for spotting this in a post-merge
but prompt code review. Proper fix in the next commit.

Signed-off-by: Marc Herbert <[email protected]>

Author: marc-hb

scripts/gen_app_partitions.py

@@ -162,7 +162,7 @@ def parse_elf_file(partitions):
 def generate_final_linker(linker_file, partitions):
     string = linker_start_seq
     size_string = ''
-    for partition, item in sorted(partitions.items()):
+    for partition, item in partitions.items():
         string += data_template.format(partition)
         if LIB in item:
             for lib in item[LIB]: