usb: musb: davinci: remove redundant code

The session is cleared in the core whenever musb_platform_disable() is
called, so clearing it in the glue driver *_musb_disable() is redundant.
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/musb/davinci.c

@@ -133,7 +133,6 @@ static void davinci_musb_disable(struct musb *musb)
 			  DAVINCI_USB_USBINT_MASK
 			| DAVINCI_USB_TXINT_MASK
 			| DAVINCI_USB_RXINT_MASK);
-	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 	musb_writel(musb->ctrl_base, DAVINCI_USB_EOI_REG, 0);
 
 	if (is_dma_capable() && !dma_off)