video: atmel: implement lcd_setcolreg funtion

index beb7fa3..4110d4d 100644
@@ -51,6 +51,12 @@ short console_row;
 #define lcdc_readl(reg)		__raw_readl((reg))
 #define lcdc_writel(reg, val)	__raw_writel((val), (reg))
 
+void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
+{
+	lcdc_writel((red << 16) | (green << 8) | blue,
+			panel_info.mmio + ATMEL_LCDC_LUT(regno));
+}
+
 void lcd_ctrl_init(void *lcdbase)
 {
 	unsigned long value;