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On sh7372 the card-detection pin of SDHI0 can also produce interrupts, when configured as GPIO. Use this feature to power down SDHI0, when no card is plugged in. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>