fix(tree): correct some typos

found using codespell (https://github.com/codespell-project/codespell).

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Change-Id: I1bfa797e3460adddeefa916bb68e22beddaf6373
diff --git a/plat/nvidia/tegra/include/drivers/tegra_gic.h b/plat/nvidia/tegra/include/drivers/tegra_gic.h
index 6661dff..9f9477c 100644
--- a/plat/nvidia/tegra/include/drivers/tegra_gic.h
+++ b/plat/nvidia/tegra/include/drivers/tegra_gic.h
@@ -19,7 +19,7 @@
 } pcpu_fiq_state_t;
 
 /*******************************************************************************
- * Fucntion declarations
+ * Function declarations
  ******************************************************************************/
 void tegra_gic_cpuif_deactivate(void);
 void tegra_gic_init(void);