at91: Add esd gmbh MEESC board support

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

Signed-off-by: Daniel Gorsulowski <Daniel.Gorsulowski@esd.eu>
diff --git a/board/esd/meesc/config.mk b/board/esd/meesc/config.mk
new file mode 100644
index 0000000..9ce161e
--- /dev/null
+++ b/board/esd/meesc/config.mk
@@ -0,0 +1 @@
+TEXT_BASE = 0x21f00000