ARM: tegra: Add prototypes for subsystem suspend functions

Signed-off-by: Colin Cross <ccross@android.com>
diff --git a/arch/arm/mach-tegra/gpio.c b/arch/arm/mach-tegra/gpio.c
index ad80488..132dcd6 100644
--- a/arch/arm/mach-tegra/gpio.c
+++ b/arch/arm/mach-tegra/gpio.c
@@ -25,6 +25,7 @@
 #include <linux/gpio.h>
 
 #include <mach/iomap.h>
+#include <mach/suspend.h>
 
 #define GPIO_BANK(x)		((x) >> 5)
 #define GPIO_PORT(x)		(((x) >> 3) & 0x3)