um: Enable TRACE_IRQFLAGS_SUPPORT

Now we have everything we need, so enable
TRACE_IRQFLAGS_SUPPORT.
Signed-off-by: NRichard Weinberger <richard@nod.at>

arch/um/Kconfig.common

@@ -31,10 +31,9 @@ config PCI
 config PCMCIA
 	bool
 
-# Yet to do!
 config TRACE_IRQFLAGS_SUPPORT
 	bool
-	default n
+	default y
 
 config LOCKDEP_SUPPORT
 	bool