ARM: mediatek: Add basic support for mt6592

* A dtsi for boards based on Mediatek MT6592 SoCs
* Compatible string in arch/arm/mach-mediatek/mediatek.c

Signed-off-by: Howard Chen <ibanezchen@gmail.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
2 files changed