test: Add PCI device entry without compat string and with DT node

Add PCI entry without compatible string and with a DT node only with
reg = <...> property into the DT. This is needed for the tests to
verify whether such a setup creates an U-Boot PCI device with the
DT node associated with it in udevice.node.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/sandbox/dts/test.dts

@@ -403,7 +403,11 @@
 		ranges = <0x02000000 0 0x30000000 0x30000000 0 0x2000
 				0x01000000 0 0x40000000 0x40000000 0 0x2000>;
 		sandbox,dev-info = <0x08 0x00 0x1234 0x5678
-				    0x0c 0x00 0x1234 0x5678>;
+				    0x0c 0x00 0x1234 0x5678
+				    0x10 0x00 0x1234 0x5678>;
+		pci@10,0 {
+			reg = <0x8000 0 0 0 0>;
+		};
 	};
 
 	pci2: pci-controller2 {