common/lcd.c: use ARRAY_SIZE

Use available macro for obtaining the size of bmp_logo_palette[]

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/common/lcd.c b/common/lcd.c
index bf1a6a9..0ea45d0 100644
--- a/common/lcd.c
+++ b/common/lcd.c
@@ -523,7 +523,7 @@
 
 	debug ("Logo: width %d  height %d  colors %d  cmap %d\n",
 		BMP_LOGO_WIDTH, BMP_LOGO_HEIGHT, BMP_LOGO_COLORS,
-		(int)(sizeof(bmp_logo_palette)/(sizeof(ushort))));
+		ARRAY_SIZE(bmp_logo_palette));
 
 	bmap = &bmp_logo_bitmap[0];
 	fb   = (uchar *)(lcd_base + y * lcd_line_length + x);
@@ -548,7 +548,7 @@
 		WATCHDOG_RESET();
 
 		/* Set color map */
-		for (i=0; i<(sizeof(bmp_logo_palette)/(sizeof(ushort))); ++i) {
+		for (i = 0; i < ARRAY_SIZE(bmp_logo_palette); ++i) {
 			ushort colreg = bmp_logo_palette[i];
 #ifdef CONFIG_ATMEL_LCD
 			uint lut_entry;