staging: ks7010: replace uint8_t in favour of u8 in michael_append

This commit replaces param which is uint8_t in michael_append
function in favour of preferred one u8. It also removes no more
needed casts when calling this function.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>