misc: pci_endpoint_test: Fix test_reg_bar to be updated in pci_endpoint_test

commit 834b9051992580ac8fd3966d023b ("misc: pci_endpoint_test: Add support
for PCI_ENDPOINT_TEST regs to be mapped to any BAR") while adding
test_reg_bar in order to map PCI_ENDPOINT_TEST regs to be mapped to any
BAR failed to update test_reg_bar in pci_endpoint_test. This results in
test_reg_bar having invalid value when used outside probe. Fix it here.

Fixes: 834b9051992580ac8fd3966d023b ("misc: pci_endpoint_test: Add support
for PCI_ENDPOINT_TEST regs to be mapped to any BAR")

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

drivers/misc/pci_endpoint_test.c

@@ -670,6 +670,7 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
 	data = (struct pci_endpoint_test_data *)ent->driver_data;
 	if (data) {
 		test_reg_bar = data->test_reg_bar;
+		test->test_reg_bar = test_reg_bar;
 		test->alignment = data->alignment;
 		irq_type = data->irq_type;
 	}