* Fix "cls" command when used with splash screen

* Increase NFS download timeout (now 1 min - 10 sec is to short for a
  slow download of a big image)
diff --git a/cpu/mpc8xx/lcd.c b/cpu/mpc8xx/lcd.c
index 794ca02..882a146 100644
--- a/cpu/mpc8xx/lcd.c
+++ b/cpu/mpc8xx/lcd.c
@@ -1333,9 +1333,11 @@
 #ifdef CONFIG_SPLASH_SCREEN
 	char *s;
 	ulong addr;
+	static int do_splash = 1;
 
-	if ((s = getenv("splashimage")) != NULL) {
+	if (do_splash && (s = getenv("splashimage")) != NULL) {
 		addr = simple_strtoul(s, NULL, 16);
+		do_splash = 0;
 
 		if (lcd_display_bitmap (addr, 0, 0) == 0) {
 			return ((void *)lcd_base);