FVP: Re-enable "Stats test cases after system suspend" test

The issue with the test has been fixed with the TF-A patch:
https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3778
so re-enable it.

Signed-off-by: Zelalem <zelalem.aweke@arm.com>
Change-Id: Ie394b596c7da504c74c684af3ef5f6065a05eef9
diff --git a/plat/arm/fvp/fvp_tests_to_skip.txt b/plat/arm/fvp/fvp_tests_to_skip.txt
index 9a79c87..d52947d 100644
--- a/plat/arm/fvp/fvp_tests_to_skip.txt
+++ b/plat/arm/fvp/fvp_tests_to_skip.txt
@@ -4,6 +4,3 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-# Fails on FVP_Base_Cortex-A55x4+Cortex-A76x2.
-# This is under investigation. Disable the test in the meantime.
-PSCI STAT/Stats test cases after system suspend