sh: mach-ecovec24: deassert usb irq on boot.

This patch prevents the USB1 interrupt from remaining asserted
immediately after re-boot or during a jump in to a secondary kernel.
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/boards/mach-ecovec24/setup.c

@@ -492,6 +492,7 @@ static int __init arch_setup(void)
 
 	/* enable USB */
 	ctrl_outw(0x0000, 0xA4D80000);
+	ctrl_outw(0x0000, 0xA4D90000);
 	gpio_request(GPIO_PTB3,  NULL);
 	gpio_request(GPIO_PTB4,  NULL);
 	gpio_request(GPIO_PTB5,  NULL);