avr32: add grasshopper (ICnova AP7000) board

The grasshopper board is a neat avr32 evaluation kit produced by In-Circuit
GmbH.
See http://www.ic-board.de/product_info.php?info=p75_ICnova-AP7000-Base.html
for detailed information about this device.

Signed-off-by: Andreas Bießmann <biessmann@corscience.de>
Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index f8d8559..fd4181f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -600,6 +600,7 @@
 Andreas Bießmann <andreas.devel@gmail.com>
 
 	at91rm9200ek	at91rm9200
+	grasshopper	avr32
 
 Cliff Brake <cliff.brake@gmail.com>