layerscape: ls1043ardb: add pad-rootfs to reduce the size of firmware.bin

Signed-off-by: Yutang Jiang <[email protected]>

target/linux/layerscape/image/Makefile

@@ -58,7 +58,7 @@ ifeq ($(SUBTARGET),32b)
 endif
   IMAGE/firmware.bin = append-ls-rcw $(1) | pad-to 1M | append-ls-uboot $(1) | pad-to 3M | \
   					append-ls-fman $(1) | pad-to 4M | append-ls-dtb $$(DEVICE_DTS) | pad-to 5M | \
-  					append-kernel | pad-to 10M | append-rootfs | pad-to 64M | check-size 67108865
+  					append-kernel | pad-to 10M | append-rootfs | pad-rootfs | check-size 67108865
 endef
 TARGET_DEVICES += ls1043ardb