malta: use as a default type device

There is currently no relevant definition for developerboard device type
in include/target.mk, thus packages like iptables, firewall, dnsmasq
etc. are missing in the default images, rendering it almost useless
for regular testing or normal use.

With this change, currently a default set of packages for "router" will
be installed to malta firmware images.

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

SVN-Revision: 47325

target/linux/malta/Makefile

@@ -15,8 +15,6 @@ MAINTAINER:=Florian Fainelli <florian@openwrt.org>
 
 KERNEL_PATCHVER:=3.18
 
-DEVICE_TYPE:=developerboard
-
 include $(INCLUDE_DIR)/target.mk
 
 DEFAULT_PACKAGES += wpad-mini kmod-mac80211-hwsim kmod-pcnet32