tegra: usb: fix wrong error check

loop_count runs down from 10000, so the correct condition to error out
is ==0.
Signed-off-by: NLucas Stach <dev@lynxeye.de>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
CC: Stephen Warren <swarren@wwwdotorg.org>
CC: Tom Warren <twarren.nvidia@gmail.com>
Tested-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NTom Warren <twarren@nvidia.com>

arch/arm/cpu/armv7/tegra2/usb.c

@@ -290,7 +290,7 @@ static int init_usb_controller(struct fdt_usb *config,
 			break;
 		udelay(1);
 	}
-	if (loop_count == 100000)
+	if (!loop_count)
 		return -1;
 
 	return 0;