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/xilinx/common/plat_startup.c b/plat/xilinx/common/plat_startup.c
index 6a83e9e..539aba2 100644
--- a/plat/xilinx/common/plat_startup.c
+++ b/plat/xilinx/common/plat_startup.c
@@ -135,7 +135,7 @@
  * @bl33:	BL33 image info structure
  * atf_handoff_addr:  ATF handoff address
  *
- * Process the handoff paramters from the FSBL and populate the BL32 and BL33
+ * Process the handoff parameters from the FSBL and populate the BL32 and BL33
  * image info structures accordingly.
  *
  * Return: Return the status of the handoff. The value will be from the