ath10k: use 64-bit crash dump timestamps

The dump format uses 64-bit timestamps already, but calling
getnstimeofday() only returns a 32-bit number on 32-bit architectures,
so that will overflow in y2038.

This changes it to use ktime_get_real_ts64() instead.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/core.h

@@ -463,7 +463,7 @@ struct ath10k_fw_crash_data {
 	bool crashed_since_read;
 
 	guid_t guid;
-	struct timespec timestamp;
+	struct timespec64 timestamp;
 	__le32 registers[REG_DUMP_COUNT_QCA988X];
 	struct ath10k_ce_crash_data ce_crash_data[CE_COUNT_MAX];
 };

drivers/net/wireless/ath/ath10k/debug.c

@@ -720,7 +720,7 @@ ath10k_debug_get_new_fw_crash_data(struct ath10k *ar)
 
 	crash_data->crashed_since_read = true;
 	guid_gen(&crash_data->guid);
-	getnstimeofday(&crash_data->timestamp);
+	ktime_get_real_ts64(&crash_data->timestamp);
 
 	return crash_data;
 }