chacha_enc.c: fix for EBCDIC platforms

Signed-off-by: Joerg Schmidbauer <jschmidb@de.ibm.com>

Reviewed-by: Patrick Steuer <patrick.steuer@de.ibm.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10417)
1 file changed