[openwrt/openwrt] ramips: mikrotik: generate a RouterBOOT v7 NOR compatible sysupgrade

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/7276e28e4779d9582a9a42d3ce217407471a2a79

commit 7276e28e4779d9582a9a42d3ce217407471a2a79
Author: John Thomson <git at johnthomson.fastmail.com.au>
AuthorDate: Mon Jan 23 07:16:04 2023 +1000

    ramips: mikrotik: generate a RouterBOOT v7 NOR compatible sysupgrade
    
    RouterBOOT v7 for NOR devices does not support the historic yaffs
    "kernel" ELF boot method.
    Generate a compatible kernel
    
    Signed-off-by: John Thomson <git at johnthomson.fastmail.com.au>
---
 target/linux/ramips/image/mt7621.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 720b90cc50..744d8c6279 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -2105,6 +2105,10 @@ define Device/MikroTik
   IMAGE/sysupgrade.bin := append-kernel | yaffs-filesystem -L | \
 	pad-to $$$$(BLOCKSIZE) | append-rootfs | pad-rootfs | check-size | \
 	append-metadata
+  IMAGES += sysupgrade-v7.bin
+  IMAGE/sysupgrade-v7.bin := append-kernel | kernel-pack-npk | \
+	  yaffs-filesystem -L | pad-to $$$$(BLOCKSIZE) | \
+	  append-rootfs | pad-rootfs | check-size | append-metadata
 endef
 
 define Device/mikrotik_ltap-2hnd