#863 - Allow tqftpserv and pd-mapper to start if qrtr is missing

This fixes #863 (closed).

Mainline devices do not need the userspace qrtr daemon as it has been integrated into the kernel. Per @DolphinChips suggestion, replace need with want in the init.d script which will allow the services to start if qrtr is missing, but still start qrtr if it is available. This shouldn't break compatibility with devices that do need qrtr.