image: assemble Hi3519DV500 full NOR images (#2208)

[widgetii]

Completes the Hi3519DV500 half of #2208 by assembling the full 16 MiB NOR images in the release image workflow, the same way #2210 did for cv6xx.

Now that the dv500 NOR boot path is wired in U-Boot (OpenIPC/u-boot-hi3519dv500#3, merged) and the emulator (widgetii/qemu-hisilicon#126, merged), the per-binning signed boot images (boot-hi3519dv500-{dmeb,dmebpro}-nor.bin) are published to the latest release. Same scheme as cv6xx — one shared kernel+rootfs blob (firmware.bin.hi3519dv500) plus the per-binning U-Boot whose baked DDR reg table differs by board layout:

variant	board	DDR
dmeb	6-layer	DDR4-2666 2 GB
dmebpro	4-layer flyby	DDR4-2666 2 GB

NOR layout (16 MiB): U-Boot @0, env @0x80000, firmware @0xc0000 (768 KiB) — matching the U-Boot MTDPARTS. Produces openipc-hi3519dv500-{dmeb,dmebpro}-nor-ultimate.bin. create_hisi skips gracefully if an artifact is missing, so this can't break the existing cv6xx/sigmastar/etc. assembly.

Verified

The assembled image (this U-Boot + firmware.bin.hi3519dv500) boots end-to-end to the login prompt on the emulated dual Cortex-A55, 3/3 runs, no Oops/panic:

VFS: Mounted root (squashfs filesystem) readonly on device 31:3.
Run /init as init process
Welcome to OpenIPC
openipc-hi3519dv500 login:

🤖 Generated with Claude Code