keucr: moved function to other file

Function usb_stor_print_cmd was declared in init.c but only used
in transport.c. So it was reasonable to move it there and declare
it static

Signed-off-by: Laura Lawniczak <laura.lawniczak@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>