drivers: net: xgene: Pre-initialize ret in xgene_enet_get_resources()

If CONFIG_ACPI=n:

    drivers/net/ethernet/apm/xgene/xgene_enet_main.c: In function ‘xgene_enet_get_resources’:
    drivers/net/ethernet/apm/xgene/xgene_enet_main.c:951: warning: ‘ret’ may be used uninitialized in this function

If the driver is bound to a legacy platform device, ret will contain
arbitrary data. If it is non-zero, it will be returned to the caller as
an error code.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/apm/xgene/xgene_enet_main.c

@@ -948,7 +948,7 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	struct resource *res;
 	void __iomem *base_addr;
 	u32 offset;
-	int ret;
+	int ret = 0;
 
 	pdev = pdata->pdev;
 	dev = &pdev->dev;