staging: ft1000: fix uninitialized return variable in request_code_segment

The return variable of request_code_segment() is used uninitialized if
the argument boot_case is false, this patch fixes it.

FYI, in ft1000_usb.h: STATUS_SUCCESS 0, and STATUS_FAILURE 0x1001.

Signed-off-by: Adam Lee <adam8157@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>