…targets

Adds two new firmware build targets running Linux 7.0 on the V2
(cv200, ARM926EJ-S) and V2A (av100, Cortex-A7) SoC families,
mirroring the existing cv300_neo / av300_neo / cv500_neo / ev300_neo
pattern. Bumps the opensdk hash to pick up the V2/V2A blob-symbol
shim work that landed in openhisilicon #170 + #171, and exercises the
hi3516av100 mainline SoC support that landed in openipc/linux #44
(DT + CRG + higmac ethernet driver).

opensdk hash: 7fa06b2 (openhisilicon main tip).

What ships:

  br-ext-chip-hisilicon/configs/hi3516cv200_neo_defconfig:
    ARM926EJ-S / ARMv5TE soft-float, musleabi toolchain
    (vendor-compatible binaries), Linux 7.0 from upstream-patches,
    BR2_GLOBAL_PATCH_DIR = all-patches-neo, vendor osdrv disabled
    (3.18-only). 8 MB NOR flash target.

  br-ext-chip-hisilicon/configs/hi3516av100_neo_defconfig:
    Cortex-A7 / ARMv7 soft-float, musleabi toolchain, Linux 7.0
    from upstream-patches, vendor osdrv disabled. 16 MB NOR target.

  br-ext-chip-hisilicon/board/hi3516cv200/hi3516cv200.neo.config:
    Seed kernel config — ARCH_HI3516CV200, COMMON_CLK_HI3516CV200,
    VIC + SP804 timer + PL011 console + hisi_femac ethernet, CMA
    for openhisilicon MMZ. Pure ARMv5TE.

  br-ext-chip-hisilicon/board/hi3516av100/hi3516av100.neo.config:
    Seed kernel config — ARCH_HI3516AV100, COMMON_CLK_HI3516AV100,
    GIC + arch-timer + PL011 + hisi_higmac (mainline mainline GMAC
    driver from openipc/linux #44). Regulator + CPU_FREQ + PM_OPP
    enabled to satisfy modpost (open_pm.ko avs paths reference these;
    the blob is gated DISABLE_PM=1 by default but residual references
    remain through the build).

  br-ext-chip-hisilicon/board/hi35*/neo-post-image.sh:
    Wraps zImage + appended DTB into uImage for U-Boot bootm.
    Per-chip DTB filename + load-address baked in.

  general/package/hisilicon-opensdk/hisilicon-opensdk.mk:
    Install open_v2_shim.ko and open_v2a_shim.ko under the
    /lib/modules/$(KVER)/hisilicon/ path on neo builds (gated on
    OPENIPC_VARIANT=neo so lite remains byte-equivalent to nightly).

Verification — both targets pass the QEMU smoke definition-of-done:

  hi3516cv200_neo (V2, 7.0):
    [PASS] login prompt
    [PASS] eth0 has IP (10.0.2.15 via SLIRP DHCP)
    [PASS] ping 10.0.2.2 (4.218 ms RTT)
    [PASS] no Oops / panic / BUG / Call Trace

  hi3516av100_neo (V2A, 7.0):
    [PASS] login prompt
    [PASS] eth0 has IP (10.0.2.15 via SLIRP DHCP)
    [PASS] ping 10.0.2.2 (2.728 ms RTT)
    [PASS] no Oops / panic / BUG / Call Trace
    [PASS] hisi-higmac 10090000.ethernet eth0: Link is Up - 100Mbps/Full

No-regression on lite targets (rebuilt against this opensdk hash via
HISILICON_OPENSDK_OVERRIDE_SRCDIR and diffed vs nightly):

  hi3516cv200_lite (V2, 4.9):
    331/331 rootfs files, 68/68 hisilicon .ko, sets identical
  hi3516av100_lite (V2A, 4.9):
    290/290 rootfs files, 61/61 hisilicon .ko, sets identical

The v2[a]_shim modules are gated `#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)`
in their source — they're benign no-op shells on 4.9 and the
firmware install block doesn't ship them on lite at all (only neo).

Known caveats — both neo targets:

  - struct timer_list.data ABI drift (chnl/viu/vpss vendor blobs)
    means video pipeline doesn't run yet; init_timer_key resolves
    but the callbacks won't fire with the correct argument until
    either a kernel patch restores .data or the blobs are
    recompiled. Documented in openhisilicon shim sources. Boot +
    network + serial console work; video does not.

  - higmac driver (mainline) is bare-minimum — no TSO, no EEE, no
    AVS, no statistics/ethtool, multicast filter is permissive.
    Suitable for boot/SSH/web management; production tuning is a
    follow-up.

CI: existing matrix rows are unchanged; this PR doesn't add neo
rows yet (cv200_neo + av100_neo qemu smoke can be added in a
follow-up once the no-CI-row dance settles).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>