ARM: tegra: Enable CPUIdle on Tegra20

As the LP3 code also works for Tegra20, we can enable cpuidle for Tegra20.
Signed-off-by: NPeter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: NStephen Warren <swarren@nvidia.com>
Tested-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

arch/arm/mach-tegra/common.c

@@ -95,8 +95,6 @@ static void __init tegra_init_cache(u32 tag_latency, u32 data_latency)
 #ifdef CONFIG_ARCH_TEGRA_2x_SOC
 void __init tegra20_init_early(void)
 {
-	disable_hlt();  /* idle WFI usage needs to be confirmed */
-
 	tegra_init_fuse();
 	tegra2_init_clocks();
 	tegra_clk_init_from_table(tegra20_clk_init_table);