ARM: tegra: Fix unchecked return value

Check a return value for tegra_powergate_remove_clamping().
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/mach-tegra/platsmp.c

@@ -124,6 +124,9 @@ static int tegra30_power_up_cpu(unsigned int cpu)
 
 	/* Remove I/O clamps. */
 	ret = tegra_powergate_remove_clamping(pwrgateid);
+	if (ret)
+		return ret;
+
 	udelay(10);
 
 	/* Clear flow controller CSR. */