nrf_wifi: Add missing declaration

Fix missing variable declaration.

Signed-off-by: Chaitanya Tata <[email protected]>

Author: krish2718

drivers/nrf_wifi/hw_if/hal/inc/hal_structs.h

@@ -247,6 +247,8 @@ struct nrf_wifi_hal_dev_ctx {
 	/** RPU wake up now asserted flag */
 	bool is_wakeup_now_asserted;
 	/** RPU wake up now asserted time */
+	unsigned long last_wakeup_now_asserted_time_ms;
+	/** RPU wake up now asserted time */
 	unsigned long last_wakeup_now_deasserted_time_ms;
 	/** RPU sleep opp time */
 	unsigned long last_rpu_sleep_opp_time_ms;