drm/kmb: Corrected typo in handle_lcd_irq

Check for Overflow bits for layer3 in the irq handler.

Fixes: 7f7b96a ("drm/kmb: Add support for KeemBay Display")
Signed-off-by: Anitha Chrisanthus <[email protected]>
Acked-by: Sam Ravnborg <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Maarten Lankhorst <[email protected]>

Author: achrisan

drivers/gpu/drm/kmb/kmb_drv.c

@@ -380,7 +380,7 @@ static irqreturn_t handle_lcd_irq(struct drm_device *dev)
 		if (val & LAYER3_DMA_FIFO_UNDERFLOW)
 			drm_dbg(&kmb->drm,
 				"LAYER3:GL1 DMA UNDERFLOW val = 0x%lx", val);
-		if (val & LAYER3_DMA_FIFO_UNDERFLOW)
+		if (val & LAYER3_DMA_FIFO_OVERFLOW)
 			drm_dbg(&kmb->drm,
 				"LAYER3:GL1 DMA OVERFLOW val = 0x%lx", val);
 	}