malta: copy initramfs images

Malta ramdisk images are no longer copied to output due to a recent change.
This change reimplements copying of ramdisk images for Malta builds.

Signed-off-by: Eric Schultz <eschultz@prplfoundation.org>

SVN-Revision: 43970

target/linux/malta/image/Makefile

@@ -37,6 +37,11 @@ define Image/Build/squashfs
     $(call prepare_generic_squashfs,$(KDIR)/root.squashfs)
 endef
 
+define Image/Build/Initramfs
+	cp $(KDIR)/vmlinux-initramfs.elf $(BIN_DIR)/$(IMG_PREFIX)-vmlinux-initramfs.elf
+	cp $(KDIR)/vmlinux-initramfs $(BIN_DIR)/$(IMG_PREFIX)-vmlinux-initramfs.bin
+endef
+
 define Image/Build
 	$(call Image/Build/$(1))
 	dd if=$(KDIR)/root.$(1) of=$(BIN_DIR)/$(IMG_PREFIX)-root.$(1) bs=128k conv=sync