staging: sep: sep_crypto.c: Remove useless function crypto_sep_dump_message

The function crypto_sep_dump_message don't have any use in this driver. So remove it.

Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>