OMAP4: Add initial OMAP4 support for Android

* Only updated Android make file.
* TI's kernel interface to the CEC driver is _very_ lacking.
* Tested with cec-client on Android.
* Kernel header (cec.h) file needs to be properly exported from kernel,
  blindly copied in this version.
* Approximate Android kernel "release" on p-android-omap-3.0 branch:
  * http://git.omapzoom.org/kernel/omap.git/?p=kernel/omap.git