ARM: tegra: cpu-tegra: sparse type fix

Type fix:
arch/arm/mach-tegra/cpu-tegra.c:144:14: warning: incorrect type in argument 5 (different signedness)
arch/arm/mach-tegra/cpu-tegra.c:144:14:    expected unsigned int *index
arch/arm/mach-tegra/cpu-tegra.c:144:14:    got int *<noident>

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/mach-tegra/cpu-tegra.c b/arch/arm/mach-tegra/cpu-tegra.c
index 0e1016a..f15b689 100644
--- a/arch/arm/mach-tegra/cpu-tegra.c
+++ b/arch/arm/mach-tegra/cpu-tegra.c
@@ -130,7 +130,7 @@
 		       unsigned int target_freq,
 		       unsigned int relation)
 {
-	int idx;
+	unsigned int idx;
 	unsigned int freq;
 	int ret = 0;