sh: Finish the sh64 migration off of ARCH_USES_GETTIMEOFFSET.

This adds sh_tmu support to the SH-5 subtypes, which subsequently allows
us to kill off time_64.c and use the now generic time_32.c. As a bonus,
SH-5 now supports highres timers and tickless for the first time.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 88eb118..ca5c09b 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -141,10 +141,6 @@
 config ARCH_HAS_DEFAULT_IDLE
 	def_bool y
 
-config ARCH_USES_GETTIMEOFFSET
-	def_bool y 
-	depends on SUPERH64
-
 config IO_TRAPPED
 	bool
 
@@ -190,6 +186,7 @@
 config CPU_SH5
 	bool
 	select CPU_HAS_FPU
+	select SYS_SUPPORTS_TMU
 
 config CPU_SHX2
 	bool