usb: dwc3: Fix dereferencing of null dwc->usb_psy

Currently the null check logic on dwc->usb_psy is inverted as it allows
calls to power_supply_put with a null dwc->usb_psy causing a null
pointer dereference. Fix this by removing the ! operator.

Addresses-Coverity: ("Dereference after null check")
Fixes: 59fa3def35de ("usb: dwc3: add a power supply for current control")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210303095826.6143-1-colin.king@canonical.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/dwc3/core.c

@@ -1628,7 +1628,7 @@ static int dwc3_probe(struct platform_device *pdev)
 assert_reset:
 	reset_control_assert(dwc->reset);
 
-	if (!dwc->usb_psy)
+	if (dwc->usb_psy)
 		power_supply_put(dwc->usb_psy);
 
 	return ret;
@@ -1653,7 +1653,7 @@ static int dwc3_remove(struct platform_device *pdev)
 	dwc3_free_event_buffers(dwc);
 	dwc3_free_scratch_buffers(dwc);
 
-	if (!dwc->usb_psy)
+	if (dwc->usb_psy)
 		power_supply_put(dwc->usb_psy);
 
 	return 0;