chore(xilinx): correct kernel doc warnings for missing functions

In commit b9d26cd3c4 ("chore(xilinx): replace fsbl with xbl"),
function and variable names were changed, but the corresponding
function name in the functional documentation comments is not updated.
Update the function and variable names as per the above commit.

Signed-off-by: Prasad Kummari <prasad.kummari@amd.com>
Change-Id: I7b777c21fe3673d29f809bf923eba38749f2c024
diff --git a/plat/xilinx/common/plat_startup.c b/plat/xilinx/common/plat_startup.c
index f45c9f0..5beb765 100644
--- a/plat/xilinx/common/plat_startup.c
+++ b/plat/xilinx/common/plat_startup.c
@@ -157,10 +157,10 @@
 #endif /* PLAT_versal_net */
 
 /**
- * xbl_tfa_handover() - Populates the bl32 and bl33 image info structures.
+ * xbl_handover() - Populates the bl32 and bl33 image info structures.
  * @bl32: BL32 image info structure.
  * @bl33: BL33 image info structure.
- * @tfa_handoff_addr: TF-A handoff address.
+ * @handoff_addr: TF-A handoff address.
  *
  * Process the handoff parameters from the XBL and populate the BL32 and BL33
  * image info structures accordingly.