slim-msm: Remove the use of depricated iommu APIs

Following apis are deprecated and replaced with device
tree properties.
	arm_iommu_create_mapping
	arm_iommu_release_mapping
	arm_iommu_attach_device
	arm_iommu_detach_device.

Change-Id: If063c4781070945255097d70f5f16607b8d14ff7
Signed-off-by: Prudhvi Yarlagadda <pyarlaga@codeaurora.org>