LU-13344 libcfs: adler32: don't set CRYPTO_TFM_RES_BAD_KEY_LEN

LU-13344 libcfs: adler32: don't set CRYPTO_TFM_RES_BAD_KEY_LEN

This flag was not being checked by most callers and has been removed since
Commit 674f368a952c ("crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN")
so remove from lustre too.

Change-Id: Ia616430a98d05c7bb3b22a0be543e83855272d2f
Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Reviewed-on: https://review.whamcloud.com/37870
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>