staging: mt7621-pci: reverse condition to check for enabled port

Each enabled port is being checked in 'mt7621_pcie_enable_ports"
function calling 'mt7621_pcie_enable_port'. The return value for
this function on success is zero, so the check is reversed. Fix it.

Fixes: 802a2f7b: staging: mt7621-pci: factor out 'mt7621_pcie_enable_port' function
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-pci/pci-mt7621.c

@@ -506,7 +506,7 @@ static void mt7621_pcie_enable_ports(struct mt7621_pcie *pcie)
 
 	list_for_each_entry(port, &pcie->ports, list) {
 		if (port->enabled) {
-			if (!mt7621_pcie_enable_port(port)) {
+			if (mt7621_pcie_enable_port(port)) {
 				dev_err(dev, "de-assert port %d PERST_N\n",
 					port->slot);
 				continue;