rhine: set VM_MAX_READAHEAD to 512K

Change-Id: I49e23923d8d11b1979cd0c501702d48916056047
Support C6802 and C6902 with a post-install script

* Modem firmware differs on C6[89]02.

Change-Id: I3569e37bdd01511b7122620486a954487db5412f
Add init extension library for s1boot version

* Set ro.boot.s1boot to oemandroidboot.s1boot=<value> from cmdline

Change-Id: I341184820096a06fbc696ab503678f7ae705b8bb
rhine: add radish blob

Change-Id: I7d697f048056a3e9f87927c442e39c78d725a9ad