iommu/pamu: Make driver depend on CONFIG_PHYS_64BIT

Certain address calculations in the driver make the
assumption that phys_addr_t and dma_addr_t are 64 bit wide.
Force this by depending on CONFIG_PHYS_64BIT to be set.
Signed-off-by: NJoerg Roedel <jroedel@suse.de>

drivers/iommu/Kconfig

@@ -77,6 +77,7 @@ config IOMMU_DMA
 config FSL_PAMU
 	bool "Freescale IOMMU support"
 	depends on PCI
+	depends on PHYS_64BIT
 	depends on PPC_E500MC || (COMPILE_TEST && PPC)
 	select IOMMU_API
 	select GENERIC_ALLOCATOR