Fix the memory mapping error for non dma-coherent target Monaco
when iommu-dma is used as "fastmap" by changing it to "atomic".
Hence, Change iommu-dma to atomic setting.
Change-Id: Ic21cbd4d5e9e429dd6aa577652d0ccb1a9acc99c
Signed-off-by: Viken Dadhaniya <quic_vdadhani@quicinc.com>