staging: ft1000: remove formal get_request_type function header from ft1000-download.c

since there was no information in the C99 style header
for function get_request_type() that was not easily obtainable
by looking at the function, the header was completely removed.

Signed-off-by: Kelley Nielsen <kelleynnn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>