TQM8548: Basic support for the TQM8548 modules

This patch adds basic support for the TQM8548 module from TQ-Components
(http://www.tqc.de/) including DDR2 SDRAM initialisation and support for
eTSEC 3 and 4

Furthermore Flash buffer write has been enabled to speed up output to
the Flash by approx. a factor of 10.

Signed-off-by: Thomas Waehner <thomas.waehner@tqs.de>
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
diff --git a/Makefile b/Makefile
index c0b73e1..894466b 100644
--- a/Makefile
+++ b/Makefile
@@ -2230,6 +2230,7 @@
 
 TQM8540_config		\
 TQM8541_config		\
+TQM8548_config		\
 TQM8555_config		\
 TQM8560_config:		unconfig
 	@mkdir -p $(obj)include