ARM: tegra: devices.c should include devices.h

Resolves lots of sparse warnings:

arch/arm/mach-tegra/devices.c:102:24: warning: symbol 'tegra_i2c_device1' was not declared. Should it be static?
arch/arm/mach-tegra/devices.c:112:24: warning: symbol 'tegra_i2c_device2' was not declared. Should it be static?
arch/arm/mach-tegra/devices.c:122:24: warning: symbol 'tegra_i2c_device3' was not declared. Should it be static?
arch/arm/mach-tegra/devices.c:132:24: warning: symbol 'tegra_i2c_device4' was not declared. Should it be static?
[...]

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Stephen Warren <swarren@nvidia.com>
diff --git a/arch/arm/mach-tegra/devices.c b/arch/arm/mach-tegra/devices.c
index 57e35d2..489e82b 100644
--- a/arch/arm/mach-tegra/devices.c
+++ b/arch/arm/mach-tegra/devices.c
@@ -29,7 +29,9 @@
 #include <mach/iomap.h>
 #include <mach/dma.h>
 #include <mach/usb_phy.h>
+
 #include "gpio-names.h"
+#include "devices.h"
 
 static struct resource i2c_resource1[] = {
 	[0] = {