crypto: aegis128 - Fix indentation issue in crypto_aegis128_process_crypt()

The code in crypto_aegis128_process_crypt() had an indentation
issue where spaces were used instead of tabs. This commit
corrects the indentation to use tabs, adhering to the
Linux kernel coding style guidelines.

Issue reported by checkpatch:
- ERROR: code indent should use tabs where possible

No functional changes are intended.

Signed-off-by: Riyan Dhiman <riyandhiman14@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>