uboot-kirkwood: fix default u-boot selection

Build the Seagate GoFlexHome u-boot for the Seagate GoFlexNet as well. The
name clearly indicates that the u-boot can be used for both boards

Build the Zyxel NSA310 u-boot if the NSA310B image is selected.

Signed-off-by: Mathias Kresin <dev@kresin.me>

package/boot/uboot-kirkwood/Makefile

@@ -30,6 +30,7 @@ endef
 
 define U-Boot/goflexhome
   NAME:=the Seagate GoFlexHome/GoFlexNet
+  BUILD_DEVICES+=goflexnet
 endef
 
 define U-Boot/ib62x0
@@ -50,6 +51,7 @@ endef
 
 define U-Boot/nsa310
   NAME:=Zyxel NSA310
+  BUILD_DEVICES:=nsa310b
 endef
 
 define U-Boot/nsa325