ARM: SAMSUNG: Consolidate common function to set SDHCI plat data

Moves similar functions to set SDHCI platform data for all Samsung
boards to a common location, thereby saves a few lines.

Signed-off-by: Banajit Goswami <banajit.g@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>