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This fixes code that set a tFC value in a register using the tRFC
value instead.
Signed-off-by: Derek Basehore <dbasehore@chromium.org>

we can reuse the dram config from loader, so we can remove dram_init()
and dts_timing_receive() funciton in dram.c, add the dram_set_odt_pd()
function to get the odt and auto power down parameter from kernel.

This also removes the dcf_code_init function to allow the system to
actually boot.
Signed-off-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: Derek Basehore <dbasehore@chromium.org>
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>

This renames dram.c and dram.h to dfs.c and dfs.h respectively. This
is to make room for common functionality between frequency scaling and
suspend code for the DRAM in a pair of common files named dram.c and
dram.h. It also removes a duplicate enum definition from
dram_spec_timing.h

Change-Id: Ibfa1041f8781401f9d27901fe8c61862bcb05562
Signed-off-by: Derek Basehore <dbasehore@chromium.org>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>

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

Change-Id: I0d0f2869aed95e336c6e23ba96a9310985c84840