at91: Add esd gmbh OTC570 board support

This patch adds support for esd gmbh OTC570 board.
The OTC570 is based on an Atmel AT91SAM9263 SoC.

Signed-off-by: Daniel Gorsulowski <Daniel.Gorsulowski@esd.eu>
diff --git a/tools/Makefile b/tools/Makefile
index 266306e..743505f 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -112,6 +112,9 @@
 ifeq ($(VENDOR),atmel)
 LOGO_BMP= logos/atmel.bmp
 endif
+ifeq ($(VENDOR),esd)
+LOGO_BMP= logos/esd.bmp
+endif
 ifeq ($(VENDOR),ronetix)
 LOGO_BMP= logos/ronetix.bmp
 endif