bsc: reduce args to f_cipher_mode()

Instead of passing each part individually, simply pass the entire
TestHdlrEncrParams to f_cipher_mode().

Preparation for A5/4.

Add the kc128 to TestHdlrEncrParams instead of a function arg. kc128 is
so far unused, but will be used in an upcoming patch adding A5/4.

Related: SYS#5324
Change-Id: I2cb8282e55436da5ae64ab569df87d5d5a0dd2f0
2 files changed