um: Use generic show_interrupts()

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common
index 1e78940..109ddc0 100644
--- a/arch/um/Kconfig.common
+++ b/arch/um/Kconfig.common
@@ -8,6 +8,7 @@
 	default y
 	select HAVE_GENERIC_HARDIRQS
 	select GENERIC_HARDIRQS_NO_DEPRECATED
+	select GENERIC_IRQ_SHOW
 
 config MMU
 	bool