Fix incorrect comment about wiki printing in Makefile

Spotted by Benjamin BELLEC <b.bellec@gmail.com>

Corresponding to flashrom svn r765.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/Makefile b/Makefile
index 332767b..fbe9f0b 100644
--- a/Makefile
+++ b/Makefile
@@ -89,7 +89,7 @@
 # Always enable Dr. Kaiser for now.
 CONFIG_DRKAISER ?= yes
 
-# Always enable wiki printing for now.
+# Disable wiki printing by default. It is only useful if you have wiki access.
 CONFIG_PRINT_WIKI ?= no
 
 ifeq ($(CONFIG_SERPROG), yes)