iommu/dart: APPLE_DART should depend on ARCH_APPLE

The Apple DART (Device Address Resolution Table) IOMMU is only present
on Apple ARM SoCs like the M1.  Hence add a dependency on ARCH_APPLE, to
prevent asking the user about this driver when configuring a kernel
without support for the Apple Silicon SoC family.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/44fcf525273b32c9afcd7e99acbd346d47f0e047.1628603162.git.geert+renesas@glider.be
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/Kconfig

@@ -292,7 +292,7 @@ config SPAPR_TCE_IOMMU
 
 config APPLE_DART
 	tristate "Apple DART IOMMU Support"
-	depends on ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64)
+	depends on ARCH_APPLE || (COMPILE_TEST && !GENERIC_ATOMIC64)
 	select IOMMU_API
 	select IOMMU_IO_PGTABLE_LPAE
 	default ARCH_APPLE