pxafb: lcsr1 is unused without CONFIG_FB_PXA_OVERLAY

Fixes the warning:

  drivers/video/pxafb.c: In function 'pxafb_handle_irq':
  drivers/video/pxafb.c:1442: warning: unused variable 'lcsr1'

[akpm@linux-foundation.org: save an ifdef]
Signed-off-by: NDenis V. Lunev <den@openvz.org>
Cc: Eric Miao <eric.miao@marvell.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/pxafb.c

@@ -1439,7 +1439,7 @@ static void pxafb_disable_controller(struct pxafb_info *fbi)
 static irqreturn_t pxafb_handle_irq(int irq, void *dev_id)
 {
 	struct pxafb_info *fbi = dev_id;
-	unsigned int lccr0, lcsr, lcsr1;
+	unsigned int lccr0, lcsr;
 
 	lcsr = lcd_readl(fbi, LCSR);
 	if (lcsr & LCSR_LDD) {
@@ -1455,14 +1455,16 @@ static irqreturn_t pxafb_handle_irq(int irq, void *dev_id)
 	lcd_writel(fbi, LCSR, lcsr);
 
 #ifdef CONFIG_FB_PXA_OVERLAY
-	lcsr1 = lcd_readl(fbi, LCSR1);
-	if (lcsr1 & LCSR1_BS(1))
-		complete(&fbi->overlay[0].branch_done);
+	{
+		unsigned int lcsr1 = lcd_readl(fbi, LCSR1);
+		if (lcsr1 & LCSR1_BS(1))
+			complete(&fbi->overlay[0].branch_done);
 
-	if (lcsr1 & LCSR1_BS(2))
-		complete(&fbi->overlay[1].branch_done);
+		if (lcsr1 & LCSR1_BS(2))
+			complete(&fbi->overlay[1].branch_done);
 
-	lcd_writel(fbi, LCSR1, lcsr1);
+		lcd_writel(fbi, LCSR1, lcsr1);
+	}
 #endif
 	return IRQ_HANDLED;
 }