fix jffs2 64k and 128k images overwrite each other

When trying to build images with jffs2 filesystem for ramips platform
there is only one jffs2 image produced instead of two (64k and 128k).

Signed-off-by: Roman Yeryomin <roman@advem.lv>

SVN-Revision: 22435

target/linux/ramips/image/Makefile

@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/image.mk
 
 define imgname
-$(BIN_DIR)/$(IMG_PREFIX)-$(2)-$(patsubst jffs2-%,jffs2,$(patsubst squashfs-%,squashfs,$(1)))
+$(BIN_DIR)/$(IMG_PREFIX)-$(2)-$(1)
 endef
 
 VMLINUX:=$(IMG_PREFIX)-vmlinux