ARM: S3C2416: Add support of SD/MMC card detect on SMDK2416

Enable card detect by GPIO pin on hsmmc1 device (SD0 on SMDK2416 board)
and enable card polling on hsmmc0 (SD1).

Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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