Merge tag 'amlogic-drivers-2' into v4.8/dt64-2

Amlogic driver updates for v4.9, 2nd round
- media: update IR support for newer SoCs
- firmware: add secure monitor driver
- net: new stmmac glue driver
- usb: udd DWC2 support for meson-gxbb
- clocks: expose more clock IDs for use by DT
- DT binding updates