sunxi: H6: Add DDR3 support to DRAM controller driver
At the moment the H6 DRAM driver only supports LPDDR3 DRAM. Extend the driver to cover DDR3 DRAM as well. The changes are partly motivated by looking at the ZynqMP register documentation, partly by looking at register dumps after boot0/libdram has initialised the controller. Many thanks to Jernej for contributing some fixes! Signed-off-by: NAndre Przywara <andre.przywara@arm.com> Tested-by: NJernej Skrabec <jernej.skrabec@siol.net> Reviewed-by: NJernej Skrabec <jernej.skrabec@siol.net> Reviewed-by: NJagan Teki <jagan@amarulasolutions.com>
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