wifi: ath12k: Assert base_lock is held before allocating REO update element

wifi: ath12k: Assert base_lock is held before allocating REO update element

Add a lockdep assertion to verify that ab->base_lock is held prior to
allocating a REO update element in ath12k_dp_prepare_reo_update_elem().
This helps detect potential concurrency issues during development and
improves code robustness.
Compiled tested only.

Signed-off-by: Sarika Sharma <sarika.sharma@oss.qualcomm.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Link: https://patch.msgid.link/20251021112204.323242-1-sarika.sharma@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>