fix(sptool): update Optee FF-A manifest

Change the OPTEE FF-A manifest to comply with changes to the sp pkg [1].
The sptool packs the image at the default offset of 0x4000, if it is not
provided in the arguments.

[1] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/14507

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I647950410114f7fc24926696212bb7f8101390ac
diff --git a/plat/arm/board/fvp/fdts/optee_sp_manifest.dts b/plat/arm/board/fvp/fdts/optee_sp_manifest.dts
index b803340..27f4724 100644
--- a/plat/arm/board/fvp/fdts/optee_sp_manifest.dts
+++ b/plat/arm/board/fvp/fdts/optee_sp_manifest.dts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2021, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2022, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -22,7 +22,7 @@
 	exception-level = <2>; /* S-EL1 */
 	execution-state = <0>; /* AARCH64 */
 	load-address = <0x6280000>;
-	entrypoint-offset = <0x1000>;
+	entrypoint-offset = <0x4000>;
 	xlat-granule = <0>; /* 4KiB */
 	boot-order = <0>;
 	messaging-method = <0x3>; /* Direct request/response supported. */