ar71xx: fix WNDR3x00 factory image generation

Factory images for WNDR3700v2 and WNDR3800 should contain these model IDs
for the device: field in their DNI tags, not WNDR3700.

This regressed in r29434, which redid WNDR3x00 model detection. The sixth
parameter to Image/Build/Netgear is only used as the -B argument to
mkdniimg, which is used to set the device: field. In r29434, this was
erroneously changed to be WNDR3700 for all models. The tools to flash
factory images (U-Boot's TFTP server and the factory software's upgrade
utility) may refuse to honor images with incorrect device: fields in their
DNI tags.

Signed-off-by: Mark Mentovai <[email protected]>

SVN-Revision: 29473

target/linux/ar71xx/image/Makefile

@@ -795,8 +795,8 @@ wndr3700_mtdlayout=mtdparts=spi0.0:320k(u-boot)ro,128k(u-boot-env)ro,1024k(kerne
 wndr3700v2_mtdlayout=mtdparts=spi0.0:320k(u-boot)ro,128k(u-boot-env)ro,1024k(kernel),14848k(rootfs),64k(art)ro,15872k@0x70000(firmware)
 define Image/Build/Profile/WNDR3700
 	$(call Image/Build/Template/$(fs_64k)/$(1),Netgear,wndr3700,$(wndr3700_cmdline),$(wndr3700_mtdlayout),3700,WNDR3700,"" NA,)
-	$(call Image/Build/Template/$(fs_64k)/$(1),Netgear,wndr3700v2,$(wndr3700_cmdline),$(wndr3700v2_mtdlayout),3701,WNDR3700,"",-H 29763654+16+64)
-	$(call Image/Build/Template/$(fs_64k)/$(1),Netgear,wndr3800,$(wndr3700_cmdline),$(wndr3700v2_mtdlayout),3701,WNDR3700,"",-H 29763654+16+128)
+	$(call Image/Build/Template/$(fs_64k)/$(1),Netgear,wndr3700v2,$(wndr3700_cmdline),$(wndr3700v2_mtdlayout),3701,WNDR3700v2,"",-H 29763654+16+64)
+	$(call Image/Build/Template/$(fs_64k)/$(1),Netgear,wndr3800,$(wndr3700_cmdline),$(wndr3700v2_mtdlayout),3701,WNDR3800,"",-H 29763654+16+128)
 endef
 
 wr400n_cmdline=board=WRT400N console=ttyS0,115200