mondrian: Clean up Samsung device inheritance

* Move wifi config items to device tree
* Move common system properties to msm8974-common
* Use nested dependencies
* Remove init.qcom.class_core and init.qcom.class_main
* Remove unused qmiproxy
* Remove init.qcom.ril.sh
* Remove init.qcom.syspart_fixup.sh
* Remove init.qcom.modem_links.sh
* Remove init.qcom.sh
* Remove init.qcom.usb.sh
* Move egl.cfg to msm8974-common
* Remove non-existant packages
* Inherit from non-telephony product, declare ro.radio.noril
* Move common overlay options to qcom-common

Change-Id: I66878eb225e4729538c64dc7b9f87991fdb55e2e