lcd: atmel: Add 32bpp support for HLCDC

Add 32bpp framebuffer support for the Atmel HLCDC driver. This is
needed for output bpp higher than 16bpp.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>

drivers/video/atmel_hlcdfb.c

@@ -162,6 +162,10 @@ void lcd_ctrl_init(void *lcdbase)
 		lcdc_writel(&regs->lcdc_basecfg1,
 			LCDC_BASECFG1_RGBMODE_16BPP_RGB_565);
 		break;
+	case 32:
+		lcdc_writel(&regs->lcdc_basecfg1,
+			LCDC_BASECFG1_RGBMODE_24BPP_RGB_888);
+		break;
 	default:
 		BUG();
 		break;