fscrypt: Drop FORBID_WEAK_KEYS flag for AES-ECB

This flag only has an effect for DES, 3DES, and XTS mode. It does
nothing for AES-ECB, as there is no concept of weak keys for AES.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Eric Biggers <[e-mail]>

fs/crypto/keysetup_v1.c

···
 		tfm = NULL;
 		goto out;
 	}
-	crypto_skcipher_set_flags(tfm, CRYPTO_TFM_REQ_FORBID_WEAK_KEYS);
 	req = skcipher_request_alloc(tfm, GFP_KERNEL);
 	if (!req) {
 		res = -ENOMEM;