usb: musb: compress return logic into one line

Simplify return logic to avoid unnecessary variable assignment.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: NBin Liu <b-liu@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/musb/musb_host.c

@@ -1540,7 +1540,7 @@ static int musb_rx_dma_iso_cppi41(struct dma_controller *dma,
 	struct dma_channel *channel = hw_ep->rx_channel;
 	void __iomem *epio = hw_ep->regs;
 	dma_addr_t *buf;
-	u32 length, res;
+	u32 length;
 	u16 val;
 
 	buf = (void *)urb->iso_frame_desc[qh->iso_idx].offset +
@@ -1552,10 +1552,8 @@ static int musb_rx_dma_iso_cppi41(struct dma_controller *dma,
 	val |= MUSB_RXCSR_DMAENAB;
 	musb_writew(hw_ep->regs, MUSB_RXCSR, val);
 
-	res = dma->channel_program(channel, qh->maxpacket, 0,
+	return dma->channel_program(channel, qh->maxpacket, 0,
 				   (u32)buf, length);
-
-	return res;
 }
 #else
 static inline int musb_rx_dma_iso_cppi41(struct dma_controller *dma,