[SPARC]: Mark sparc and sparc64 as not having virt_to_bus

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index b84b6af..df6ee71 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -62,6 +62,9 @@
 	bool
 	default y
 
+config ARCH_NO_VIRT_TO_BUS
+	def_bool y
+
 choice
 	prompt "Kernel page size"
 	default SPARC64_PAGE_SIZE_8KB