sparc: turn CONFIG_OF into a select

so that we can make CONFIG_OF global and remove it from
the architecture Kconfig files later.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

arch/sparc/Kconfig

@@ -18,6 +18,7 @@ config 64BIT
 config SPARC
 	bool
 	default y
+	select OF
 	select HAVE_IDE
 	select HAVE_OPROFILE
 	select HAVE_ARCH_KGDB if !SMP || SPARC64
@@ -149,7 +150,7 @@ config ARCH_NO_VIRT_TO_BUS
 	def_bool y
 
 config OF
-	def_bool y
+	bool
 
 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 	def_bool y if SPARC64