Cocci spatch "pool_zalloc-simple" - v5.2-rc1

[Thomas Meyer]

Use *_pool_zalloc rather than *_pool_alloc followed by memset with 0.

Found by coccinelle spatch "api/alloc/pool_zalloc-simple.cocci"

Run against version v5.2-rc1

P.S. If you find this email unwanted, set up a procmail rule junking on
the header:

X-Patch: Cocci