Fix (invert/revert) Hornet-UB WPS LED state

My previous patch regarding the Hornet-UB board
(commit: beed4d82d6a0154b0cd5f7b84e2180215ace6718) actually
causes the WPS led state to be inverted. Practically this meant
that value 0 in /sys/class/led/alfa:blue:wps/brightness would
turn the LED on and any positive value (1-255) would turn it off.

The above of course is confusing and hence reverting this value
back to the way it was before beed4d82d6a0154b0cd5f7b84e2180215ace6718.

Signed-off-by: Janne Cederberg <janne.cederberg@gmail.com>

SVN-Revision: 44791

target/linux/ar71xx/files/arch/mips/ath79/mach-hornet-ub.c

@@ -65,7 +65,7 @@ static struct gpio_led hornet_ub_leds_gpio[] __initdata = {
 	{
 		.name		= "alfa:blue:wps",
 		.gpio		= HORNET_UB_GPIO_LED_WPS,
-		.active_low	= 0,
+		.active_low	= 1,
 	},
 };