sh: ubc wakeup for SH-4 only.

SH-4A parts generally don't have any use for this, and it requires an
alternate implementation anyways. Leave this as an SH-4 only option,
as that's the only place this has been needed in the past.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 754a75e..496d635 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -605,7 +605,7 @@
 
 config UBC_WAKEUP
 	bool "Wakeup UBC on startup"
-	depends on CPU_SH4
+	depends on CPU_SH4 && !CPU_SH4A
 	help
 	  Selecting this option will wakeup the User Break Controller (UBC) on
 	  startup. Although the UBC is left in an awake state when the processor