dma-mapping: fix build when !CONFIG_ARM_SMMU

Allow compilation when CONFIG_ARM_SMMU is not selected by making
CONFIG_IOMMU_IO_PGTABLE_FAST depend on CONFIG_ARM64_DMA_USE_IOMMU
or CONFIG_ARM_DMA_USE_IOMMU.

CRs-Fixed: 2000526
Change-Id: Iadfc236f848f46e6742a98581dbfdb13c7a2695e
Signed-off-by: Atul Raut <araut@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>