r8152: Add RTL8152_INACCESSIBLE to r8156b_wait_loading_flash()

Delay loops in r8152 should break out if RTL8152_INACCESSIBLE is set
so that they don't delay too long if the device becomes
inaccessible. Add the break to the loop in
r8156b_wait_loading_flash().

Fixes: 195aae321c82 ("r8152: support new chips")
Reviewed-by: Grant Grundler <[e-mail]>
Signed-off-by: Douglas Anderson <[e-mail]>
Acked-by: Hayes Wang <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/usb/r8152.c

···
 		int i;
 
 		for (i = 0; i < 100; i++) {
+			if (test_bit(RTL8152_INACCESSIBLE, &tp->flags))
+				break;
 			if (ocp_read_word(tp, MCU_TYPE_USB, USB_GPHY_CTRL) & GPHY_PATCH_DONE)
 				break;
 			usleep_range(1000, 2000);