8xxx/ddr: add support to only compute the ddr sdram size
This patch adds fsl_ddr_sdram_size to only calculate the ddr sdram size, in case that the DDR SDRAM is initialized in the 2nd stage uboot and should not be intialized again in the final stage uboot. Signed-off-by: NHaiying Wang <Haiying.Wang@freescale.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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