ARM: Kconfig.debug: OC_ETM and CORESIGHT are mutually exclusive

The android tree still has the legacy ETM driver, but it cannot
coexist with the new Coresight driver, so make sure they are mutually
exclusive at compile time.

Signed-off-by: Kevin Hilman <khilman@linaro.org>
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 96651f7..21c031f 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -1299,7 +1299,7 @@
 
 config OC_ETM
 	bool "On-chip ETM and ETB"
-	depends on ARM_AMBA
+	depends on ARM_AMBA && !CORESIGHT
 	help
 	  Enables the on-chip embedded trace macrocell and embedded trace
 	  buffer driver that will allow you to collect traces of the