ARM: mach-shmobile: sh73a0.h: add GPIO_NR

GPIO_NR is added in order to clarify end of GPIO array.
We can add extra GPIO from it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Simon Horman <horms@verge.net.au>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

arch/arm/mach-shmobile/include/mach/sh73a0.h

@@ -482,6 +482,9 @@ enum {
 	GPIO_FN_FSIAILR_PU,
 	GPIO_FN_FSIAIBT_PU,
 	GPIO_FN_FSIAISLD_PU,
+
+	/* end of GPIO */
+	GPIO_NR,
 };
 
 /* DMA slave IDs */