xtensa: Use generic show_interrupts()

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index a1c7482..d0ecf7e2 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -8,6 +8,7 @@
 	def_bool y
 	select HAVE_IDE
 	select HAVE_GENERIC_HARDIRQS
+	select GENERIC_IRQ_SHOW
 	select GENERIC_HARDIRQS_NO_DEPRECATED
 	help
 	  Xtensa processors are 32-bit RISC machines designed by Tensilica