s5pc110: SDHCI-s3c can override host capabilities

Each board can override the default sdhci host capabilities.
Some board has broken features by hardwares and support 8-bit bandwidth.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>