tests/functional/aarch64/ast2700fc: Add eth2 network interface check in PCIe test

Enhance the AST2700 functional PCIe test to verify the network interface
configuration for eth2. This adds an additional command to check the IP
address assignment on eth2 to ensure network functionality is correctly
initialized in the test environment.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20251015062210.3128710-11-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

tests/functional/aarch64/test_aspeed_ast2700fc.py

@@ -60,6 +60,9 @@ class AST2x00MachineSDK(QemuSystemTest):
             'lspci -s 0002:01:00.0',
             '0002:01:00.0 Ethernet controller: '
             'Intel Corporation 82574L Gigabit Network Connection')
+        exec_command_and_wait_for_pattern(self,
+            'ip addr show dev eth2',
+            'inet 10.0.2.15/24')
 
     def do_ast2700fc_ssp_test(self):
         self.vm.shutdown()
@@ -135,6 +138,7 @@ class AST2x00MachineSDK(QemuSystemTest):
 
     def test_aarch64_ast2700fc_sdk_v09_08(self):
         self.set_machine('ast2700fc')
+        self.require_netdev('user')
 
         self.archive_extract(self.ASSET_SDK_V908_AST2700)
         self.start_ast2700fc_test('ast2700-default')