[ARM] pxafb: fix the incorrect configuration of GPIO77 as ACBIAS for TFT LCD

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Tested-by: Alex Osborne <ato@meshy.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/video/pxafb.c

@@ -1031,7 +1031,9 @@ static void pxafb_setup_gpio(struct pxafb_info *fbi)
 	pxa_gpio_mode(GPIO74_LCD_FCLK_MD);
 	pxa_gpio_mode(GPIO75_LCD_LCLK_MD);
 	pxa_gpio_mode(GPIO76_LCD_PCLK_MD);
-	pxa_gpio_mode(GPIO77_LCD_ACBIAS_MD);
+
+	if ((lccr0 & LCCR0_PAS) == 0)
+		pxa_gpio_mode(GPIO77_LCD_ACBIAS_MD);
 }
 
 static void pxafb_enable_controller(struct pxafb_info *fbi)