PCI: endpoint: Clear BAR before freeing its space

Associated pci_epf_bar structure is needed in pci_epc_clear_bar() to
clear a BAR correctly but it is reset in pci_epf_free_space() (that
is called first) which results in pci_epc_clear_bar() failure.

Reorder the pci_epc_clear_bar()/pci_epf_free_space() calls execution
to fix the issue.

Signed-off-by: Alan Mikhak <[e-mail]>
[[e-mail]: reworded the commit log]
Signed-off-by: Lorenzo Pieralisi <[e-mail]>
Acked-by: Kishon Vijay Abraham I <[e-mail]>

drivers/pci/endpoint/functions/pci-epf-test.c

···
 		epf_bar = &epf->bar[bar];
 
 		if (epf_test->reg[bar]) {
-			pci_epf_free_space(epf, epf_test->reg[bar], bar);
 			pci_epc_clear_bar(epc, epf->func_no, epf_bar);
+			pci_epf_free_space(epf, epf_test->reg[bar], bar);
 		}
 	}
 }