imx: nitrogen6x: Enabled data cache

Signed-off-by: Robert Winkler <robert.winkler@boundarydevices.com>
diff --git a/include/configs/nitrogen6x.h b/include/configs/nitrogen6x.h
index aea91bc..039085e 100644
--- a/include/configs/nitrogen6x.h
+++ b/include/configs/nitrogen6x.h
@@ -276,8 +276,6 @@
 #define CONFIG_OF_LIBFDT
 #define CONFIG_CMD_BOOTZ
 
-#define CONFIG_SYS_DCACHE_OFF
-
 #ifndef CONFIG_SYS_DCACHE_OFF
 #define CONFIG_CMD_CACHE
 #endif