backlight: simplify lcd notifier

With all the work I've done on replacing fb notifier calls with direct
calls into fbcon the backlight/lcd notifier is the only user left.

It will only receive events now that it cares about, hence we can
remove this check.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190528090304.9388-34-daniel.vetter@ffwll.ch

drivers/video/backlight/lcd.c

@@ -30,17 +30,6 @@ static int fb_notifier_callback(struct notifier_block *self,
 	struct lcd_device *ld;
 	struct fb_event *evdata = data;
 
-	/* If we aren't interested in this event, skip it immediately ... */
-	switch (event) {
-	case FB_EVENT_BLANK:
-	case FB_EVENT_MODE_CHANGE:
-	case FB_EARLY_EVENT_BLANK:
-	case FB_R_EARLY_EVENT_BLANK:
-		break;
-	default:
-		return 0;
-	}
-
 	ld = container_of(self, struct lcd_device, fb_notif);
 	if (!ld->ops)
 		return 0;