Don't grab memory for LCD if FB address is defined

If FB address is defined specific address then don't grab memory for LCD

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Cc: Albert Aribaud <albert.aribaud@free.fr>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Kim Phillips <kim.phillips@freescale.com>
Cc: Andy Fleming <afleming@gmail.com>
Cc: Kumar Gala <kumar.gala@freescale.com>
diff --git a/README b/README
index 85cbb8e..ba4fdd4 100644
--- a/README
+++ b/README
@@ -2011,6 +2011,20 @@
 		thus overwriting the architecutre dependent default
 		settings.
 
+- Frame Buffer Address:
+	CONFIG_FB_ADDR
+
+	Define CONFIG_FB_ADDR if you want to use specific address for
+	frame buffer.
+	Then system will reserve the frame buffer address to defined address
+	instead of lcd_setmem (this function grab the memory for frame buffer
+	by panel's size).
+
+	Please see board_init_f function.
+
+	If you want this config option then,
+	please define it at your board config file
+
 Legacy uImage format:
 
   Arg	Where			When