Revert "crypto: api - Use work queue in crypto_destroy_instance"

This reverts commit 048545d9 which is
commit 9ae4577b upstream.

It breaks the android KABI so revert it.  If it needs to come back in
the future, it can be modified to do so in an abi-safe way.

Bug: 161946584
Change-Id: I99e23f307011ff3a7e4b0dfbd6f341512caa3a3d
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>