mmc: mxcmmc: Include interrupt.h in the platform data header

The mxcmmc platform data header depends on interrupt.h. Don't rely on the
public mmc header host.h to include it, bud instead make that dependency
explicit.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

include/linux/platform_data/mmc-mxcmmc.h

 #ifndef ASMARM_ARCH_MMC_H
 #define ASMARM_ARCH_MMC_H
 
+#include <linux/interrupt.h>
 #include <linux/mmc/host.h>
 
 struct device;