[PATCHv2 ath-next] wifi: ath12k: use kzalloc_flex

[Rameshkumar Sundaram]

On 4/22/2026 3:05 AM, Rosen Penev wrote:
> Convert kzalloc_obj + kcalloc to kzalloc_flex to save an allocation.
> 
> Add __counted_by to get extra runtime analysis. Move counting variable
> assignment immediately after allocation before any potential accesses.
> kzalloc_flex does this anyway for GCC >= 15.
> 
> Signed-off-by: Rosen Penev <rosenp at gmail.com>
> Reviewed-by: Baochen Qiang <baochen.qiang at oss.qualcomm.com>
Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram at oss.qualcomm.com>