sh: Select ARCH_HIBERNATION_POSSIBLE.

Now that the requisite patches have gone in, this can safely be enabled
across the board for all of the 32-bit SH platforms.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -28,6 +28,7 @@ config SUPERH32
 	select HAVE_FTRACE_MCOUNT_RECORD
 	select HAVE_DYNAMIC_FTRACE
 	select HAVE_ARCH_KGDB
+	select ARCH_HIBERNATION_POSSIBLE if MMU
 
 config SUPERH64
 	def_bool y if CPU_SH5