omap iommu: Make CONFIG_OMAP_IOMMU_DEBUG selectable
omap iommu: Make CONFIG_OMAP_IOMMU_DEBUG selectable

This CONFIG_OMAP_IOMMU_DEBUG option cannot be selected because it's
not visible on menu. Make this option selectable.

Signed-off-by: Hiroshi DOYU <e891c4ae8deef7e6c0a3fb82004ec71ca9fb7e00@nokia.com>
Cc: Laurent Pinchart <3ded2f39a78f0d7044839546f95841842b4d7c96@ideasonboard.com>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas