sh: make latencytop available on SMP, too.

The UP dependency was inherited from ARM, which seems to have run in to
it due to the stacktrace code not being available for SMP in certain
cases, as we don't have this particular limitation there is no specific
need to block on the SMP dependency.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -157,7 +157,6 @@ config LOCKDEP_SUPPORT
 
 config HAVE_LATENCYTOP_SUPPORT
 	def_bool y
-	depends on !SMP
 
 config ARCH_HAS_ILOG2_U32
 	def_bool n