usb: bdc: Fix unused assignment in bdc_probe()

Delete unused initialized value of 'ret', because it will
be assigned by the function clk_prepare_enable().

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

drivers/usb/gadget/udc/bdc/bdc_core.c

@@ -484,7 +484,7 @@ static void bdc_phy_exit(struct bdc *bdc)
 static int bdc_probe(struct platform_device *pdev)
 {
 	struct bdc *bdc;
-	int ret = -ENOMEM;
+	int ret;
 	int irq;
 	u32 temp;
 	struct device *dev = &pdev->dev;