Add Sony Xperia Z1 Compact [amami] support

Device tree: https://github.com/OmarEinea/android_device_sony_amami
All repos we need are in ( pa.dependencies )
No other commits are needed.

Also I already compiled it and posted it (as unofficial) here:
http://forum.xda-developers.com/showthread.php?t=2764775

Of course I'm willing to become the maintainer.

Thank you.