Merge pull request #684 from rockchip-linux/add-sdram-for-rk3399

rockchip: add dram driver for rk3399

rockchip: rk3399: add dram driver

add dram driver, and kernel can through sip function talk to bl31 to
do ddr frequency scaling. and ddr auto powerdown.

Change-Id: I0d0f2869aed95e336c6e23ba96a93109

rockchip: rk3399: add dram driver

add dram driver, and kernel can through sip function talk to bl31 to
do ddr frequency scaling. and ddr auto powerdown.

Change-Id: I0d0f2869aed95e336c6e23ba96a9310985c84840

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Merge pull request #653 from rockchip-linux/support-rockchip-sip-runtime-service

rockchip: support plat SIP runtime service for rk3399

rockchip: support plat SIP runtime service

Software executing in the normal world and in the trusted world at
exception levels lower than EL3 will request runtime services using the
SMC instruction.

rockchip: support plat SIP runtime service

Software executing in the normal world and in the trusted world at
exception levels lower than EL3 will request runtime services using the
SMC instruction.

See the documentation here:
https://github.com/ARM-software/arm-trusted-firmware/blob/master/docs/
rt-svc-writers-guide.md

This to be implemented as an EL3 Runtime Service in rockchip BL31
platform port, using the "SiP Service Call" range as specified in the
SMC Calling Convention.
This doesn't support any SMC yet, we will support it in later.

Change-Id: I0a638dd0b653c28b08f79d89f77ed7c69864017d

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