sh: Convert to generic show_interrupts.

Trivial conversion, simply encapsulate the NMI stats in the arch code.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index ca649d3..2d264fa 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -25,6 +25,7 @@
 	select GENERIC_ATOMIC64
 	# Support the deprecated APIs until MFD and GPIOLIB catch up.
 	select GENERIC_HARDIRQS_NO_DEPRECATED if !MFD_SUPPORT && !GPIOLIB
+	select GENERIC_IRQ_SHOW
 	help
 	  The SuperH is a RISC processor targeted for use in embedded systems
 	  and consumer electronics; it was also used in the Sega Dreamcast