soc/tegra: pmc: Make tegra_powergate_is_powered() a local function

Now there are no more external users of tegra_powergate_is_powered(),
make this a local function.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/soc/tegra/pmc.c

@@ -637,7 +637,7 @@ EXPORT_SYMBOL(tegra_powergate_power_off);
  * tegra_powergate_is_powered() - check if partition is powered
  * @id: partition ID
  */
-int tegra_powergate_is_powered(unsigned int id)
+static int tegra_powergate_is_powered(unsigned int id)
 {
 	if (!tegra_powergate_is_valid(id))
 		return -EINVAL;

include/soc/tegra/pmc.h

@@ -161,7 +161,6 @@ enum tegra_io_pad {
 #define TEGRA_IO_RAIL_LVDS	TEGRA_IO_PAD_LVDS
 
 #ifdef CONFIG_SOC_TEGRA_PMC
-int tegra_powergate_is_powered(unsigned int id);
 int tegra_powergate_power_on(unsigned int id);
 int tegra_powergate_power_off(unsigned int id);
 int tegra_powergate_remove_clamping(unsigned int id);
@@ -182,11 +181,6 @@ void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode);
 void tegra_pmc_enter_suspend_mode(enum tegra_suspend_mode mode);
 
 #else
-static inline int tegra_powergate_is_powered(unsigned int id)
-{
-	return -ENOSYS;
-}
-
 static inline int tegra_powergate_power_on(unsigned int id)
 {
 	return -ENOSYS;