net: stmmac: disable Split Header (SPH) for Intel platforms

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2122226



commit 47f753c1
Author: Tan Tee Min <tee.min.tan@linux.intel.com>
Date: Fri, 29 Apr 2022 19:58:07 +0800

    Based on DesignWare Ethernet QoS datasheet, we are seeing the limitation
    of Split Header (SPH) feature is not supported for Ipv4 fragmented packet.
    This SPH limitation will cause ping failure when the packets size exceed
    the MTU size. For example, the issue happens once the basic ping packet
    size is larger than the configured MTU size and the data is lost inside
    the fragmented packet, replaced by zeros/corrupted values, and leads to
    ping fail.

    So, disable the Split Header for Intel platforms.

    v2: Add fixes tag in commit message.

    Fixes: 67afd6d1("net: stmmac: Add Split Header support and enable it in XGMAC cores")
    Cc: <stable@vger.kernel.org> # 5.10.x
Suggested-by: Ong, Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>
Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Signed-off-by: Tan Tee Min <tee.min.tan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Mark Salter <msalter@redhat.com>