msm8660-common: Cleanup Samsung device inheritance

* Move media codecs into platform trees
* Move postrecoveryboot script to qcom-common
* Clean up BoardConfig for qcom-common changes
* Add Qualcomm packages to msm8660.mk
* Remove init.qcom.class_core and init.qcom.class_main
* Remove init.qcom.early_boot
* Move init.qcom.efs.sync.sh to msm8660-common
* Move init.qcom.syspart_fixup.sh to msm8660-common
* Remove init.qcom.sh
* Remove init.qcom.post_boot.sh
* Remove init.qcom.usb.sh
* Remove duplicate idc files
* Remove duplicate keychar files
* Remove duplicate keylayout files
* Use nested cm.dependencies
* Move common platform system to msm8660-common
* Start thermald on boot complete
* Mount firmware partition in fstab
* Move QCOM_BSP to platform repos
* Move common overlay options to qcom-common
* Move lpm.rc to msm8660-common
* Remove unused services

Change-Id: Ie95634a13205f0c5ca93cdc82f1f265e432161c5