Without this patch one sdcard image with the following name is created
for all devices:
openwrt-at91-sama5--sdcard.img.gz
This makes the build system create device specific versions like:
openwrt-at91-sama5-at91-sama5d2_xplained-sdcard.img.gz
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
31fca075c7