ci: update bl31 (no spmd) prebuilt to TF-A v2.8

As Trusty tests were removed from test runs [1], there is no longer a
dependency to BL31 image built with Trusty SPD and the downstream
Android TF-A fork.
Refresh prebuilts with upstream TF-A. Those binaries are used with tests
run through the test.sh script (either qemu or FVP platform) where the
SPMD is not required.

[1] https://review.trustedfirmware.org/c/hafnium/hafnium/+/16826

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I0c5c3b94eb4829bdf90d186039eeb754fc9a48ce
diff --git a/prebuilts b/prebuilts
index ad13d7a..abcac2e 160000
--- a/prebuilts
+++ b/prebuilts
@@ -1 +1 @@
-Subproject commit ad13d7a81a9ed30c968f5e95c87e8b33ce1a830f
+Subproject commit abcac2e2e44d6e916970f522264264f0ef43f9a2
diff --git a/src/arch/aarch64/qemuloader/BUILD.gn b/src/arch/aarch64/qemuloader/BUILD.gn
index bf0e81d..3ac33e5 100644
--- a/src/arch/aarch64/qemuloader/BUILD.gn
+++ b/src/arch/aarch64/qemuloader/BUILD.gn
@@ -38,9 +38,9 @@
 
 copy("tfa_trusty_copy") {
   sources = [
-    "//prebuilts/linux-aarch64/trusted-firmware-a-trusty/qemu/bl2.bin",
-    "//prebuilts/linux-aarch64/trusted-firmware-a-trusty/qemu/bl31.bin",
-    "//prebuilts/linux-aarch64/trusted-firmware-a-trusty/qemu/bl32.bin",
+    "//prebuilts/linux-aarch64/trusted-firmware-a/qemu/bl2.bin",
+    "//prebuilts/linux-aarch64/trusted-firmware-a/qemu/bl31.bin",
+    "//prebuilts/linux-aarch64/trusted-firmware-a/qemu/bl32.bin",
   ]
   outputs = [
     "$root_out_dir/{{source_file_part}}",
diff --git a/test/hftest/hftest.py b/test/hftest/hftest.py
index 6c65b67..03daf98 100755
--- a/test/hftest/hftest.py
+++ b/test/hftest/hftest.py
@@ -47,10 +47,10 @@
     "Linux64_GCC-9.3", "FVP_Base_RevC-2xAEMvA")
 HF_PREBUILTS = os.path.join(HF_ROOT, "prebuilts")
 QEMU_PREBUILTS = os.path.join(HF_PREBUILTS, MACHINE, "qemu", "qemu-system-aarch64")
-FVP_PREBUILTS_TFA_TRUSTY_ROOT = os.path.join(
-    HF_PREBUILTS, "linux-aarch64", "trusted-firmware-a-trusty", "fvp")
+FVP_PREBUILTS_TFA_ROOT = os.path.join(
+    HF_PREBUILTS, "linux-aarch64", "trusted-firmware-a", "fvp")
 FVP_PREBUILT_DTS = os.path.join(
-    FVP_PREBUILTS_TFA_TRUSTY_ROOT, "fvp-base-gicv3-psci-1t.dts")
+    FVP_PREBUILTS_TFA_ROOT, "fvp-base-gicv3-psci-1t.dts")
 
 FVP_PREBUILT_TFA_SPMD_ROOT = os.path.join(
     HF_PREBUILTS, "linux-aarch64", "trusted-firmware-a-spmd", "fvp")
@@ -237,7 +237,7 @@
 
         if self.tfa:
             bl1_path = os.path.join(
-                HF_PREBUILTS, "linux-aarch64", "trusted-firmware-a-trusty",
+                HF_PREBUILTS, "linux-aarch64", "trusted-firmware-a",
                 "qemu", "bl1.bin")
             exec_args += ["-bios",
                 os.path.abspath(bl1_path),
@@ -434,7 +434,7 @@
 
     @property
     def FVP_PREBUILT_BL31(self):
-        return os.path.join(FVP_PREBUILTS_TFA_TRUSTY_ROOT, "bl31.bin")
+        return os.path.join(FVP_PREBUILTS_TFA_ROOT, "bl31.bin")
 
     @property
     def HYPERVISOR_ADDRESS(self):