pxa: balloon3/colibri_pxa270: fix environment optionally being nowhere

I couldn't quite figure out whether or not CONFIG_SYS_ENV_IS_NOWHERE
actually ever worked but nowadays this is called CONFIG_ENV_IS_NOWHERE.

Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>

include/configs/balloon3.h

@@ -134,7 +134,7 @@
 #define	CONFIG_ENV_IS_IN_FLASH
 #else
 #define	CONFIG_SYS_NO_FLASH
-#define	CONFIG_SYS_ENV_IS_NOWHERE
+#define	CONFIG_ENV_IS_NOWHERE
 #endif
 
 #define	CONFIG_SYS_MONITOR_BASE		0x000000

include/configs/colibri_pxa270.h

@@ -142,7 +142,7 @@
 
 #else	/* No flash */
 #define	CONFIG_SYS_NO_FLASH
-#define	CONFIG_SYS_ENV_IS_NOWHERE
+#define	CONFIG_ENV_IS_NOWHERE
 #endif
 
 #define	CONFIG_SYS_MONITOR_BASE		0x0

include/configs/vpac270.h

@@ -221,7 +221,7 @@
 
 #else	/* No flash */
 #define	CONFIG_SYS_NO_FLASH
-#define	CONFIG_SYS_ENV_IS_NOWHERE
+#define	CONFIG_ENV_IS_NOWHERE
 #endif
 
 /*