ar71xx: rename 'nand' subtarget to 'mikrotik'

It is for Mikrotik devices only, rename the subtarget
to reflect that. Also fix the wget2nand script to use
the new image names.

Based on the patch by Stefan Agner:
http://patchwork.openwrt.org/patch/4123/

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 38509

target/linux/ar71xx/Makefile

@@ -11,7 +11,7 @@ BOARD:=ar71xx
 BOARDNAME:=Atheros AR7xxx/AR9xxx
 FEATURES:=squashfs targz mips16
 CPU_TYPE=34kc
-SUBTARGETS:=generic nand
+SUBTARGETS:=generic mikrotik
 
 LINUX_VERSION:=3.10.17
 

target/linux/ar71xx/base-files/sbin/wget2nand

@@ -27,8 +27,8 @@ url=$1
         exit 1
 }
 
-url_kernel=$url/openwrt-ar71xx-nand-vmlinux-lzma.elf
-url_rootfs=$url/openwrt-ar71xx-nand-rootfs.tar.gz
+url_kernel=$url/openwrt-ar71xx-mikrotik-vmlinux-lzma.elf
+url_rootfs=$url/openwrt-ar71xx-mikrotik-rootfs.tar.gz
 
 mtd_kernel="$(find_mtd_part 'kernel')"
 mtd_rootfs="$(find_mtd_part 'rootfs')"