imx: nitrogen6x: Enable raw initrd

Signed-off-by: Robert Winkler <robert.winkler@boundarydevices.com>
diff --git a/include/configs/nitrogen6x.h b/include/configs/nitrogen6x.h
index c5118d1..01c3f13 100644
--- a/include/configs/nitrogen6x.h
+++ b/include/configs/nitrogen6x.h
@@ -286,5 +286,6 @@
 #define CONFIG_SYS_ALT_MEMTEST
 
 #define CONFIG_CMD_BOOTZ
+#define CONFIG_SUPPORT_RAW_INITRD
 
 #endif	       /* __CONFIG_H */