[ARM] Add ARM irqtrace support

This adds support for irqtrace for lockdep on ARM.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index f81a623..d9376f0 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -51,6 +51,10 @@
 	bool
 	default y
 
+config TRACE_IRQFLAGS_SUPPORT
+	bool
+	default y
+
 config HARDIRQS_SW_RESEND
 	bool
 	default y