ubi: ubifs: Turn off verbose prints

The prints are out of control.  SILENCE!

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/README b/README
index 81d3681..da8b68a 100644
--- a/README
+++ b/README
@@ -2814,6 +2814,11 @@
 
 		Requires also defining CONFIG_RBTREE
 
+		CONFIG_UBI_SILENCE_MSG
+
+		Make the verbose messages from UBI stop printing.  This leaves
+		warnings and errors enabled.
+
 - UBIFS support
 		CONFIG_CMD_UBIFS
 
@@ -2822,6 +2827,11 @@
 
 		Requires UBI support as well as CONFIG_LZO
 
+		CONFIG_UBIFS_SILENCE_MSG
+
+		Make the verbose messages from UBIFS stop printing.  This leaves
+		warnings and errors enabled.
+
 - SPL framework
 		CONFIG_SPL
 		Enable building of SPL globally.