Tegra: flowctrl: rename tegra_fc_cpu_idle() to tegra_fc_cpu_powerdn()

This patch renames the tegra_fc_cpu_idle() function to a more appropriate
tegra_fc_cpu_powerdn() to better reflect its usage.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/common/drivers/flowctrl/flowctrl.c

@@ -98,9 +98,9 @@ static void tegra_fc_prepare_suspend(int cpu_id, uint32_t csr)
 }
 
 /*******************************************************************************
- * Suspend the current CPU
+ * Powerdn the current CPU
  ******************************************************************************/
-void tegra_fc_cpu_idle(uint32_t mpidr)
+void tegra_fc_cpu_powerdn(uint32_t mpidr)
 {
 	int cpu = mpidr & MPIDR_CPU_MASK;
 

plat/nvidia/tegra/include/drivers/flowctrl.h

@@ -73,8 +73,8 @@ static inline void tegra_fc_write_32(uint32_t off, uint32_t val)
 	mmio_write_32(TEGRA_FLOWCTRL_BASE + off, val);
 }
 
-void tegra_fc_cpu_idle(uint32_t mpidr);
 void tegra_fc_cluster_idle(uint32_t midr);
+void tegra_fc_cpu_powerdn(uint32_t mpidr);
 void tegra_fc_cluster_powerdn(uint32_t midr);
 void tegra_fc_soc_powerdn(uint32_t midr);
 void tegra_fc_cpu_on(int cpu);