Additionally the SDRAM address decoding register address is not hard coded
in the C code any more. A define is introduced for this base address.
This makes is possible to use those gpio functions from other MVEBU SoC's
Signed-off-by: Stefan Roese <firstname.lastname@example.org>
Tested-by: Luka Perkov <email@example.com>
Acked-by: Prafulla Wadaskar <firstname.lastname@example.org>