cns3xxx: fix uImage build issue

The uImage target will always fail on a clean build due to dependency issues.
Building the uImage isn't necessary anyway as its re-built with correct
entry points in image/Makefile so remove it.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

SVN-Revision: 39778

target/linux/cns3xxx/Makefile

@@ -23,7 +23,7 @@ define Target/Description
 	eg. the Gateworks Laguna family
 endef
 
-KERNELNAME:="zImage uImage"
+KERNELNAME:="zImage"
 
 DEFAULT_PACKAGES += kmod-ath9k kmod-usb2 wpad-mini