tests/functional/aarch64/ast2700fc: Add vbootrom test

Add start_ast2700fc_test_vbootrom() which boots the ast2700fc machine
with -bios ast27x0_bootrom.bin and reuses the coprocessor loader.

Add test_aarch64_ast2700fc_sdk_vbootrom_v09_08() to test the vbootrom
with ast2700fc machine.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20251015062210.3128710-13-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

tests/functional/aarch64/test_aspeed_ast2700fc.py

@@ -138,6 +138,12 @@ class AST2x00MachineSDK(QemuSystemTest):
         self.do_test_aarch64_aspeed_sdk_start(
                 self.scratch_file(name, 'image-bmc'))
 
+    def start_ast2700fc_test_vbootrom(self, name):
+        self.vm.add_args('-bios', 'ast27x0_bootrom.bin')
+        self.load_ast2700fc_coprocessor(name)
+        self.do_test_aarch64_aspeed_sdk_start(
+                self.scratch_file(name, 'image-bmc'))
+
     def test_aarch64_ast2700fc_sdk_v09_08(self):
         self.set_machine('ast2700fc')
         self.require_netdev('user')
@@ -150,5 +156,14 @@ class AST2x00MachineSDK(QemuSystemTest):
         self.do_ast2700fc_ssp_test()
         self.do_ast2700fc_tsp_test()
 
+    def test_aarch64_ast2700fc_sdk_vbootrom_v09_08(self):
+        self.set_machine('ast2700fc')
+
+        self.archive_extract(self.ASSET_SDK_V908_AST2700)
+        self.start_ast2700fc_test_vbootrom('ast2700-default')
+        self.verify_openbmc_boot_and_login('ast2700-default')
+        self.do_ast2700fc_ssp_test()
+        self.do_ast2700fc_tsp_test()
+
 if __name__ == '__main__':
     QemuSystemTest.main()