leds: da903x: (da9030 only) led brightness reversed.

The brightness control register calculation (for the pwm) is
effectively the reverse of what would be expected.
1 is maximum brightness, 255 minimum.

This patch inverts this.
Signed-off-by: NJonathan Cameron <jic23@cam.ac.uk>
Acked-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NEric Miao <eric.miao@marvell.com>

drivers/leds/leds-da903x.c

@@ -58,7 +58,7 @@ static void da903x_led_work(struct work_struct *work)
 		offset = DA9030_LED_OFFSET(led->id);
 		val = led->flags & ~0x87;
 		val |= (led->new_brightness) ? 0x80 : 0; /* EN bit */
-		val |= (led->new_brightness >> 5) & 0x7; /* PWM<2:0> */
+		val |= (0x7 - (led->new_brightness >> 5)) & 0x7; /* PWM<2:0> */
 		da903x_write(led->master, DA9030_LED1_CONTROL + offset, val);
 		break;
 	case DA9030_ID_VIBRA: