ci(spmd): update fvp prebuilt hash to latest tfa

Re-built BL31 SPMD for FVP platform from TF-A upstream commit [1].
Update hftest.py with Hypervisor manifest dtb address expected by the
SPMD prebuilt.

[1] https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/commit/?id=99026cff47e35b3f5abd68a19cba1a4fb683fdc4
[2] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/12132

Change-Id: Ifadd04ca69b1d889bc24daeeacad1d2e335aebb4
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/prebuilts b/prebuilts
index aeee4ee..94d66c4 160000
--- a/prebuilts
+++ b/prebuilts
@@ -1 +1 @@
-Subproject commit aeee4eed0a5f47856c15c1db56d0ec6452b8f939
+Subproject commit 94d66c465d0d1b06a4a5d82c8d242fe8d6faf123
diff --git a/test/hftest/hftest.py b/test/hftest/hftest.py
index 65e267e..55a84eb 100755
--- a/test/hftest/hftest.py
+++ b/test/hftest/hftest.py
@@ -575,7 +575,7 @@
 
     @property
     def HYPERVISOR_DTB_ADDRESS(self):
-        return "0x80000000"
+        return "0x82000000"
 
     def compile_dt(self, run_state, dt):
         FvpDriver.compile_dt(self, run_state, dt["hypervisor"])