ipw2x00: Fix comment for CLOCK_BOOTTIME constant

Correct name of constant is CLOCK_BOOTTIME and not CLOCK_BOOTIME.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200508195139.20078-1-pali@kernel.org

drivers/net/wireless/intel/ipw2x00/ipw2200.h

@@ -1329,7 +1329,7 @@ struct ipw_priv {
 
 	s8 tx_power;
 
-	/* Track time in suspend using CLOCK_BOOTIME */
+	/* Track time in suspend using CLOCK_BOOTTIME */
 	time64_t suspend_at;
 	time64_t suspend_time;