pci: Fix memory leaks in uninorth (ppc)

The future cookie was leaked in three of four error scenarios.

Backported from grackle.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38345 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/bus_managers/pci/arch/ppc/openfirmware/uninorth.cpp

@@ -243,6 +243,7 @@ ppc_openfirmware_probe_uninorth(int deviceNode,
 
 	if (bytesRead < 0) {
 		dprintf("ppc_openfirmware_probe_uninorth: Could not get ranges.\n");
+		free(bridge);
 		return B_ERROR;
 	}
 	bridge->range_count = bytesRead / sizeof(uninorth_range);
@@ -269,11 +270,13 @@ ppc_openfirmware_probe_uninorth(int deviceNode,
 
 	if (ioRange == NULL) {
 		dprintf("ppc_openfirmware_probe_uninorth: Can't find io range.\n");
+		free(bridge);
 		return B_ERROR;
 	}
 
 	if (memoryRangeCount == 0) {
 		dprintf("ppc_openfirmware_probe_uninorth: Can't find mem ranges.\n");
+		free(bridge);
 		return B_ERROR;
 	}