sh: Generic BUG only works for sh32.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -32,7 +32,7 @@ config RWSEM_XCHGADD_ALGORITHM
 
 config GENERIC_BUG
 	def_bool y
-	depends on BUG
+	depends on BUG && SUPERH32
 
 config GENERIC_FIND_NEXT_BIT
 	bool