[PATCH] kconfig: document make K64BIT=y in README

[Sam Ravnborg <sam@ravnborg.org>]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---
 README |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/README b/README
index 159912c..6622ba1 100644
--- a/README
+++ b/README
@@ -194,6 +194,8 @@ CONFIGURING the kernel:
    "make *config" checks for a file named "all{yes/mod/no/random}.config"
    for symbol values that are to be forced.  If this file is not found,
    it checks for a file named "all.config" to contain forced values.
+   Finally it checks the environment variable K64BIT and set the config
+   symbol "64BIT" to the value of the K64BIT variable.
    
 	NOTES on "make config":
 	- having unnecessary drivers will make the kernel bigger, and can
-- 
1.5.3.4.1157.g0e74-dirty