net: atlantic: Avoid -Wflex-array-member-not-at-end warnings

JIRA: https://issues.redhat.com/browse/RHEL-105363

commit 33b565f
Author: Gustavo A. R. Silva <gustavoars@kernel.org>
Date:   Tue Feb 4 12:40:49 2025 +1030

    net: atlantic: Avoid -Wflex-array-member-not-at-end warnings

    -Wflex-array-member-not-at-end was introduced in GCC-14, and we are
    getting ready to enable it, globally.

    Remove unused flexible-array member `buf` and, with this, fix the following
    warnings:
    drivers/net/ethernet/aquantia/atlantic/aq_hw.h:197:36: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
    drivers/net/ethernet/aquantia/atlantic/hw_atl/../aq_hw.h:197:36: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

    Suggested-by: Igor Russkikh <irusskikh@marvell.com>
    Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
    Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
    Reviewed-by: Simon Horman <horms@kernel.org>
    Reviewed-by: Igor Russkikh <irusskikh@marvell.com>
    Link: https://patch.msgid.link/Z6F3KZVfnAZ2FoJm@kspp
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Izabela Bakollari <ibakolla@redhat.com>

Author: Izabela Bakollari

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h

@@ -226,7 +226,6 @@ struct __packed offload_info {
 	struct offload_port_info ports;
 	struct offload_ka_info kas;
 	struct offload_rr_info rrs;
-	u8 buf[];
 };
 
 struct __packed hw_atl_utils_fw_rpc {