BACKPORT: FROMGIT: blk-crypto: make blk_crypto_evict_key() return void

blk_crypto_evict_key() is only called in contexts such as inode eviction
where failure is not an option.  So there is nothing the caller can do
with errors except log them.  (dm-table.c does "use" the error code, but
only to pass on to upper layers, so it doesn't really count.)

Just make blk_crypto_evict_key() return void and log errors itself.

Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230315183907.53675-2-ebiggers@kernel.org


Signed-off-by: Jens Axboe <axboe@kernel.dk>

Bug: 270098322
(cherry picked from commit 70493a63
 https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/log/?h=for-next

)
Change-Id: I8b9c7a74473e21fb740f021ac9f2fff95f986aa4
Signed-off-by: Eric Biggers <ebiggers@google.com>