ramips: Fix mistake in U-Boot instructions for MIGRATOR image

iopsys-ramips/image/mt7621.mk

@@ -208,7 +208,7 @@ define Build/iopsys-y3-migrator-image
     echo '# cd $$HOME/iopsyswrt-4' && \
     echo '# ./iop bootstrap && ./iop feeds_update' && \
     echo '# ./iop genconfig ex400' && \
-    echo '# make -j$$(nproc) toolchain' && \
+    echo '# make -j$$(nproc) toolchain/compile' && \
     echo '## clone and compile u-boot on ex400 branch with IOPSYSWRT-4-toolchain' && \
     echo '# git clone git@dev.iopsys.eu:fork/uboot.git ~/u-boot-iopsys && cd ~/u-boot-iopsys' && \
     echo '# export PATH="$$HOME/iopsyswrt-4/staging_dir/toolchain-mipsel_1004kc_gcc-5.5.0_musl/bin:$PATH"' && \
@@ -219,7 +219,7 @@ define Build/iopsys-y3-migrator-image
     echo '# cp ./uboot.img YOUR_IOPSYSWRT6_DIRECTORY/build_dir/target-mipsel_24kc_musl/linux-iopsys-ramips_mt7621/uboot.img' && \
     exit 1; \
   fi
-  
+
 	$(call make-header-y3,header.y3,$(KDIR)/uboot.img,void,$(IMAGE_ROOTFS),void,pkginfo,bundled-migrator-script.tar.gz,$(IMAGE_KERNEL))
 	cat $(KDIR)/header.y3 \
       $(IMAGE_ROOTFS) \