sh: sh64 still needs ARCH_USES_GETTIMEOFFSET temporarily.

sh64 is still using this, so re-enable it temporarily while SH-5 gets
converted to use the generic code.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -141,6 +141,10 @@ config ARCH_NO_VIRT_TO_BUS
 config ARCH_HAS_DEFAULT_IDLE
 	def_bool y
 
+config ARCH_USES_GETTIMEOFFSET
+	def_bool y 
+	depends on SUPERH64
+
 config IO_TRAPPED
 	bool